CVE-2020-8193: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-bed64393a3bd, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass Vulnerability
- Vendor
- Citrix
- Product
- Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance
- Added to the catalog
- 2021-11-03
- Due date for US federal agencies
- 2022-05-03
- Weaknesses
- CWE-284
- Catalog version
- 2026.10.30
Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an authorization bypass vulnerability that may allow unauthenticated access to certain URL endpoints. The attacker must have access to the NetScaler IP (NSIP) in order to perform exploitation.
Required action (CISA)
Apply updates per vendor instructions.
Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.
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
- 2020-07-10T16:15:12.157
- Last modified
- 2026-06-17T03:26:01.560
- Weaknesses
- CWE-284, CWE-287
Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows unauthenticated access to certain URL endpoints.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | [email protected] (Primary) |
| CVSS 3.1 | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 5 | MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N | [email protected] (Primary) |
References
- http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html (Exploit, Third Party Advisory, VDB Entry)
- https://support.citrix.com/article/CTX276688 (Vendor Advisory)
- http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html (Exploit, Third Party Advisory, VDB Entry)
- https://support.citrix.com/article/CTX276688 (Vendor Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8193 (US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:41:51.476Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-8193
CVE record
- Assigner
- hackerone
- State
- PUBLISHED
- Published
- 2020-07-10T15:38:28.000Z
- Updated
- 2025-10-21T23:35:40.928Z
- Problem types
- Improper Access Control - Generic (CWE-284)
Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows unauthenticated access to certain URL endpoints.
References
- https://support.citrix.com/article/CTX276688
- http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html
Read on 2026-11-03T01:05:01.400Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2020/8xxx/CVE-2020-8193.json
Detection rules (SigmaHQ)
SigmaHQ rules whose own tags name this CVE. Each rule page shows the rule as its author published it.
- Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195 (status test, level critical)
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-284: Improper Access Control
- Harden: Software Update (acts on Software)
- Harden: Agent Authentication (acts on User Account)
- Harden: Change Default Password (acts on User Account)
- Harden: Trusted Library (acts on Subroutine)
- Restore: Restore Software (acts on Software)
- Harden: Domain Logic Validation (acts on Subroutine)
- Model: Software Inventory (acts on Software)
- Restore: Unlock Account (acts on User Account)
- Restore: Restore User Account Access (acts on User Account)
- Evict: Account Locking (acts on User Account)
- Isolate: Application-based Process Isolation (acts on Subroutine)
- Harden: Variable Initialization (acts on Subroutine)
- Harden: Credential Scrubbing (acts on Subroutine)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Isolate: User Account Permissions (acts on User Account)
- Model: Access Modeling (acts on User Account)
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:55:41.179Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-284.json
CWE-287: Improper Authentication
- Harden: Credential Scrubbing (acts on Subroutine)
- Model: Software Inventory (acts on Software)
- Isolate: User Account Permissions (acts on User Account)
- Harden: Domain Logic Validation (acts on Subroutine)
- Restore: Unlock Account (acts on User Account)
- Harden: Trusted Library (acts on Subroutine)
- Harden: Agent Authentication (acts on User Account)
- Restore: Restore User Account Access (acts on User Account)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Isolate: Application-based Process Isolation (acts on Subroutine)
- Harden: Change Default Password (acts on User Account)
- Restore: Restore Software (acts on Software)
- Harden: Variable Initialization (acts on Subroutine)
- Harden: Software Update (acts on Software)
- Model: Access Modeling (acts on User Account)
- Evict: Account Locking (acts on User Account)
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:55:44.276Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-287.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.
SigmaHQ
"Citrix ADS Exploitation CVE-2020-8193 CVE-2020-8195" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2020/Exploits/CVE-2020-8193/web_cve_2020_8193_8195_citrix_exploit.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-2020-8193: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass Vulnerability",
entity page, dataset version ref-bed64393a3bd, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2020-8193 (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 2026-06-17T03:26:01.560.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:35:40.928Z.
Underlying source: SigmaHQ rule 0d0d9a8a-a49e-4e27-b061-7ce4b936cfb7, 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.