CVE-2021-25296: Nagios XI OS Command Injection
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-5838af13b6a2, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Nagios XI OS Command Injection
- Vendor
- Nagios
- Product
- Nagios XI
- Added to the catalog
- 2022-01-18
- Due date for US federal agencies
- 2022-02-01
- Weaknesses
- CWE-78, CWE-138
- Catalog version
- 2026.10.30
Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.
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
- 2021-02-15T13:15:12.683
- Last modified
- 2026-07-09T13:39:49.130
- Weaknesses
- NVD-CWE-Other
Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | [email protected] (Primary) |
| CVSS 3.1 | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 9 | HIGH | AV:N/AC:L/Au:S/C:C/I:C/A:C | [email protected] (Primary) |
References
- http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- https://assets.nagios.com/downloads/nagiosxi/versions.php (Product)
- https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md (Exploit, Third Party Advisory)
- https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and (Exploit, Third Party Advisory)
- http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html (Exploit, Third Party Advisory, VDB Entry)
- http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html (Third Party Advisory, VDB Entry)
- https://assets.nagios.com/downloads/nagiosxi/versions.php (Product)
- https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md (Exploit, Third Party Advisory)
- https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and (Exploit, Third Party Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296 (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-2021-25296
CVE record
- Assigner
- mitre
- State
- PUBLISHED
- Published
- 2021-02-15T00:00:00.000Z
- Updated
- 2026-07-09T00:12:24.420Z
- Problem types
- n/a
Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server.
References
- https://assets.nagios.com/downloads/nagiosxi/versions.php
- https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md
- http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html
- https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and
Read on 2026-11-03T01:06:33.394Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2021/25xxx/CVE-2021-25296.json
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.
Cite this page
Dragons Eye Ransomware Tracker, "CVE-2021-25296: Nagios XI OS Command Injection",
entity page, dataset version ref-5838af13b6a2, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2021-25296 (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 2026-07-09T13:39:49.130.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2026-07-09T00:12:24.420Z.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.