CVE-2021-20090

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Summary

CVECVE-2021-20090
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-29 15:15:00 UTC
Updated2023-10-18 01:15:00 UTC
DescriptionA 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.

Risk And Classification

EPSS: 0.943690000 probability, percentile 0.999650000 (date 2026-04-01)

CISA KEV: Listed on 2021-11-03; due 2021-11-17; ransomware use Unknown

Problem Types: CWE-22

CISA Known Exploited Vulnerability

VendorArcadyan
ProductBuffalo Firmware
NameArcadyan Buffalo Firmware Path Traversal Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2021-20090

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Buffalo Wsr-2533dhp3-bk - All All All
Operating System Buffalo Wsr-2533dhp3-bk Firmware All All All All
Hardware Buffalo Wsr-2533dhpl2-bk - All All All
Operating System Buffalo Wsr-2533dhpl2-bk Firmware All All All All

References

ReferenceSourceLinkTags
Multiple Vulnerabilities in Buffalo WSR-2533DHPL2 and WSR-2533DHP3 - Research Advisory | Tenable® MISC www.tenable.com
Routers & Modems Under Active Exploitation in Arcadyan Firmware MISC www.secpod.com
VU#914124 - Arcadyan-based routers and modems vulnerable to authentication bypass CERT-VN www.kb.cert.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 731232 Buffalo Router Authentication Bypass Vulnerability
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