CVE-2021-20090
Last modified
CVE-2021-20090 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.98% chance of exploitation in the next 30 days.
Description
A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Buffalo | Wsr-2533dhpl2-Bk Firmware | <= 1.02 |
| Buffalo | Wsr-2533dhp3-Bk Firmware | <= 1.24 |
References
- https://www.kb.cert.org/vuls/id/914124Third Party Advisory, US Government Resource
- https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/Exploit, Third Party Advisory
- https://www.tenable.com/security/research/tra-2021-13Exploit, Third Party Advisory
- https://www.kb.cert.org/vuls/id/914124Third Party Advisory, US Government Resource
- https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/Exploit, Third Party Advisory
- https://www.tenable.com/security/research/tra-2021-13Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2021-20090?
How severe is CVE-2021-20090?
How do I fix CVE-2021-20090?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-20085Improperly Controlled Modification of Object Prototype Attri…8.8
- CVE-2021-20086Improperly Controlled Modification of Object Prototype Attri…8.8
- CVE-2021-20087Improperly Controlled Modification of Object Prototype Attri…8.8
- CVE-2021-20088Improperly Controlled Modification of Object Prototype Attri…8.8
- CVE-2021-20089Improperly Controlled Modification of Object Prototype Attri…8.8
- CVE-2021-2009Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
- CVE-2021-20091The web interfaces of Buffalo WSR-2533DHPL2 firmware version…8.8
- CVE-2021-20092The web interfaces of Buffalo WSR-2533DHPL2 firmware version…7.5
- CVE-2021-20093A buffer over-read vulnerability exists in Wibu-Systems Code…9.1
- CVE-2021-20094A denial of service vulnerability exists in Wibu-Systems Cod…7.5
- CVE-2021-20095Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-20096Cross-site request forgery in OpenOversight 0.6.4 allows a r…8.1
Are you affected by CVE-2021-20090?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST