CVE-2021-44228: Apache Log4j2 Remote Code Execution Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-abda51a94d62, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Apache Log4j2 Remote Code Execution Vulnerability
- Vendor
- Apache
- Product
- Log4j2
- Added to the catalog
- 2021-12-10
- Due date for US federal agencies
- 2021-12-24
- Weaknesses
- CWE-20, CWE-400, CWE-502
- Catalog version
- 2026.10.30
Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution.
Required action (CISA)
For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.
Ransomware use: CISA marks this vulnerability as known to be used in ransomware campaigns. CISA does not say which group used it.
Links in CISA's notes
Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
NVD analysis
- Status
- Analyzed
- Published
- 2021-12-10T10:15:09.143
- Last modified
- 2026-08-11T19:33:44.513
- Weaknesses
- CWE-20, CWE-400, CWE-502, CWE-917
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 10 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | [email protected] (Primary) |
| CVSS 3.1 | 10 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 9.3 | HIGH | AV:N/AC:M/Au:N/C:C/I:C/A:C | [email protected] (Primary) |
References
- http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html (Broken Link, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- http://seclists.org/fulldisclosure/2022/Dec/2 (Exploit, Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2022/Jul/11 (Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2022/Mar/23 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/10/1 (Mailing List, Mitigation, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/10/2 (Mailing List, Mitigation, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/10/3 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/13/1 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/13/2 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/14/4 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/15/3 (Mailing List, Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf (Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf (Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf (Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf (Third Party Advisory)
- https://github.com/cisagov/log4j-affected-db (Third Party Advisory)
- https://github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-LIST.md (Broken Link, Product, US Government Resource)
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228 (Exploit, Third Party Advisory)
- https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html (Mailing List, Third Party Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5CSVUNV4HWZZXGOKNSK6L7RPM7BOKIB/ (Release Notes)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/ (Release Notes)
- https://logging.apache.org/log4j/2.x/security.html (Release Notes, Vendor Advisory)
- https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/ (Patch, Third Party Advisory, Vendor Advisory)
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 (Third Party Advisory)
- https://security.netapp.com/advisory/ntap-20211210-0007/ (Third Party Advisory)
- https://support.apple.com/kb/HT213189 (Third Party Advisory)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd (Third Party Advisory)
- https://twitter.com/kurtseifried/status/1469345530182455296 (Broken Link, Exploit, Third Party Advisory)
- https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001 (Third Party Advisory)
- https://www.debian.org/security/2021/dsa-5020 (Mailing List, Third Party Advisory)
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html (Third Party Advisory)
- https://www.kb.cert.org/vuls/id/930724 (Third Party Advisory, US Government Resource)
- https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html (Exploit, Third Party Advisory)
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html (Third Party Advisory)
- https://www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- https://www.oracle.com/security-alerts/cpujan2022.html (Patch, Third Party Advisory)
- http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html (Broken Link, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html (Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- http://seclists.org/fulldisclosure/2022/Dec/2 (Exploit, Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2022/Jul/11 (Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2022/Mar/23 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/10/1 (Mailing List, Mitigation, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/10/2 (Mailing List, Mitigation, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/10/3 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/13/1 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/13/2 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/14/4 (Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2021/12/15/3 (Mailing List, Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf (Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf (Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf (Third Party Advisory)
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf (Third Party Advisory)
- https://github.com/cisagov/log4j-affected-db (Third Party Advisory)
- https://github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-LIST.md (Broken Link, Product, US Government Resource)
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228 (Exploit, Third Party Advisory)
- https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html (Mailing List, Third Party Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5CSVUNV4HWZZXGOKNSK6L7RPM7BOKIB/ (Release Notes)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/ (Release Notes)
- https://logging.apache.org/log4j/2.x/security.html (Release Notes, Vendor Advisory)
- https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/ (Patch, Third Party Advisory, Vendor Advisory)
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 (Third Party Advisory)
- https://security.netapp.com/advisory/ntap-20211210-0007/ (Third Party Advisory)
- https://support.apple.com/kb/HT213189 (Third Party Advisory)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd (Third Party Advisory)
- https://twitter.com/kurtseifried/status/1469345530182455296 (Broken Link, Exploit, Third Party Advisory)
- https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001 (Third Party Advisory)
- https://www.debian.org/security/2021/dsa-5020 (Mailing List, Third Party Advisory)
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html (Third Party Advisory)
- https://www.kb.cert.org/vuls/id/930724 (Third Party Advisory, US Government Resource)
- https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html (Exploit, Third Party Advisory)
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html (Third Party Advisory)
- https://www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- https://www.oracle.com/security-alerts/cpujan2022.html (Patch, Third Party Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-44228 (Third Party Advisory, US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:41:59.479Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-44228
CVE record
- Title (CNA)
- Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
- Assigner
- apache
- State
- PUBLISHED
- Published
- 2021-12-10T00:00:00.000Z
- Updated
- 2025-10-21T23:25:23.121Z
- Problem types
- CWE-502 Deserialization of Untrusted Data; CWE-400 Uncontrolled Resource Consumption; CWE-20 Improper Input Validation
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
References
- https://logging.apache.org/log4j/2.x/security.html
- [oss-security] 20211210 CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
- [oss-security] 20211210 Re: CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
- 20211210 Vulnerability in Apache Log4j Library Affecting Cisco Products: December 2021
- [oss-security] 20211210 Re: CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
- https://security.netapp.com/advisory/ntap-20211210-0007/
- http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html
- DSA-5020
- [debian-lts-announce] 20211212 [SECURITY] [DLA 2842-1] apache-log4j2 security update
- FEDORA-2021-f0f501d01f
- Microsoft’s Response to CVE-2021-44228 Apache Log4j 2
- [oss-security] 20211213 Re: CVE-2021-4104: Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2
- [oss-security] 20211213 CVE-2021-4104: Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2
- [oss-security] 20211214 CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack
- 20211210 A Vulnerability in Apache Log4j Library Affecting Cisco Products: December 2021
- VU#930724
- https://twitter.com/kurtseifried/status/1469345530182455296
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf
- http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html
- http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html
- 20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021
- [oss-security] 20211215 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack
- http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html
- http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html
- http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html
- http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html
- http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf
- FEDORA-2021-66d6c484f3
- http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf
- https://www.oracle.com/security-alerts/cpujan2022.html
- http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.html
- https://github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-LIST.md
- http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.html
- 20220314 APPLE-SA-2022-03-14-7 Xcode 13.3
- https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001
- https://github.com/cisagov/log4j-affected-db
- https://support.apple.com/kb/HT213189
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228
- https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html
- 20220721 Open-Xchange Security Advisory 2022-07-21
- http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html
- http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.html
- 20221208 Intel Data Center Manager <= 5.1 Local Privileges Escalation
- http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.html
Read on 2026-11-03T01:09:19.506Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2021/44xxx/CVE-2021-44228.json
Also known as / affected packages
GHSA-jfh8-c2jp-5v3q
Also known as: CVE-2021-44228. OSV.dev record, GitHub advisory.
- Maven org.apache.logging.log4j:log4j-core: introduced 2.13.0, fixed 2.15.0
- Maven org.apache.logging.log4j:log4j-core: introduced 2.0-beta9, fixed 2.3.1
- Maven org.apache.logging.log4j:log4j-core: introduced 2.4, fixed 2.12.2
- Maven com.guicedee.services:log4j-core: introduced 0, last_affected 1.2.1.2-jre17
- Maven org.xbib.elasticsearch:log4j
- Maven uk.co.nichesolutions.logging.log4j:log4j-core
- Maven org.ops4j.pax.logging:pax-logging-log4j2: introduced 1.8.0, fixed 1.9.2
- Maven org.ops4j.pax.logging:pax-logging-log4j2: introduced 1.10.0, fixed 1.10.8
- Maven org.ops4j.pax.logging:pax-logging-log4j2: introduced 1.11.0, fixed 1.11.10
- Maven org.ops4j.pax.logging:pax-logging-log4j2: introduced 2.0.0, fixed 2.0.11
Read on 2026-11-03T00:57:05.911Z under licence ghsa-cc-by-4.0@9e5f1b3c from https://api.osv.dev/v1/vulns/GHSA-jfh8-c2jp-5v3q
Detection rules (SigmaHQ)
SigmaHQ rules whose own tags name this CVE. Each rule page shows the rule as its author published it.
- Potential CVE-2021-44228 Exploitation Attempt - VMware Horizon (status test, level high)
- Log4j RCE CVE-2021-44228 in Fields (status test, level high)
Defensive techniques (MITRE D3FEND)
D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.
CWE-20: Improper Input Validation
- Harden: Variable Initialization (acts on Subroutine)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Isolate: Application-based Process Isolation (acts on Subroutine)
- Restore: Restore Software (acts on Software)
- Harden: Credential Scrubbing (acts on Subroutine)
- Model: Software Inventory (acts on Software)
- Harden: Software Update (acts on Software)
- Harden: Trusted Library (acts on Subroutine)
- Harden: Domain Logic Validation (acts on Subroutine)
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:53:54.540Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-20.json
CWE-400: Uncontrolled Resource Consumption
D3FEND lists no defensive technique for this weakness.
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:56:19.986Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-400.json
CWE-502: Deserialization of Untrusted Data
- Harden: Software Update (acts on Software)
- Harden: Trusted Library (acts on Subroutine)
- Model: Software Inventory (acts on Software)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Harden: Domain Logic Validation (acts on Subroutine)
- Harden: Variable Initialization (acts on Subroutine)
- Harden: Credential Scrubbing (acts on Subroutine)
- Restore: Restore Software (acts on Software)
- Isolate: Application-based Process Isolation (acts on Subroutine)
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:56:57.230Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-502.json
CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
- Harden: Domain Logic Validation (acts on Subroutine)
- Harden: Credential Scrubbing (acts on Subroutine)
- Harden: Variable Initialization (acts on Subroutine)
- Model: Software Inventory (acts on Software)
- Restore: Restore Software (acts on Software)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Harden: Software Update (acts on Software)
- Isolate: Application-based Process Isolation (acts on Subroutine)
- Harden: Trusted Library (acts on Subroutine)
D3FEND ontology version 1.6.0.
Read on 2026-11-03T00:03:21.049Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-917.json
MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/
Sources and licences
CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
GitHub Advisory Database via OSV.dev
GHSA-jfh8-c2jp-5v3q: GitHub Advisory Database, https://github.com/advisories/GHSA-jfh8-c2jp-5v3q. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/), provided as is, without warranties. Retrieved via OSV.dev (https://osv.dev/vulnerability/GHSA-jfh8-c2jp-5v3q), which enriches records; fields selected and reformatted by ransomware-tracker.com.
SigmaHQ
"Potential CVE-2021-44228 Exploitation Attempt - VMware Horizon" by @kostastsale (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-44228/proc_creation_win_exploit_cve_2021_44228_vmware_horizon_log4j.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-LicenseSigmaHQ
"Log4j RCE CVE-2021-44228 in Fields" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-44228/web_cve_2021_44228_log4j_fields.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-LicenseMITRE D3FEND
MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/MITRE D3FEND Terms of Use (site + knowledge graph); source repo MIT
Cite this page
Dragons Eye Ransomware Tracker, "CVE-2021-44228: Apache Log4j2 Remote Code Execution Vulnerability",
entity page, dataset version ref-abda51a94d62, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2021-44228 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-08-11T19:33:44.513.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:25:23.121Z.
Underlying source: GitHub Advisory Database, GHSA-jfh8-c2jp-5v3q, via OSV.dev, modified 2025-10-22T19:37:02.616807Z.
Underlying source: SigmaHQ rule 3eb91f0a-0060-424a-a676-59f5fdd75610, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Underlying source: SigmaHQ rule 9be472ed-893c-4ec0-94da-312d2765f654, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Underlying source: MITRE D3FEND, ontology version 1.6.0.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.