CVE-2021-20091
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-8df5344aa83e, updated 2026-06-17T03:33:15.640Z.
NVD analysis
- Status
- Modified
- Published
- 2021-04-29T15:15:10.660
- Last modified
- 2026-06-17T03:33:15.640
- Weaknesses
- NVD-CWE-noinfo
The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.
| 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 2.0 | 6.5 | MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P | [email protected] (Primary) |
References
- https://www.tenable.com/security/research/tra-2021-13 (Third Party Advisory)
- https://www.tenable.com/security/research/tra-2021-13 (Third Party Advisory)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-03T01:42:30.961Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-20091
CVE record
- Assigner
- tenable
- State
- PUBLISHED
- Published
- 2021-04-29T14:29:09.000Z
- Updated
- 2024-08-03T17:30:07.625Z
- Problem types
- Static Code Injection
The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.
References
Read on 2026-11-03T01:05:50.321Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2021/20xxx/CVE-2021-20091.json
Detection rules (SigmaHQ)
SigmaHQ rules whose own tags name this CVE. Each rule page shows the rule as its author published it.
- Arcadyan Router Exploitations (status test, level critical)
Sources and licences
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
"Arcadyan Router Exploitations" by Bhabesh Raj (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-20090/web_cve_2021_20090_2021_20091_arcadyan_router_exploit.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "CVE-2021-20091",
entity page, dataset version ref-8df5344aa83e, updated 2026-06-17T03:33:15.640Z,
https://ransomware-tracker.com/cve/CVE-2021-20091 (accessed 2026-11-03).
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T03:33:15.640.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2024-08-03T17:30:07.625Z.
Underlying source: SigmaHQ rule f0500377-bc70-425d-ac8c-e956cd906871, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.