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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2021-20090

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

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.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

buffalo wsr-2533dhpl2, buffalo wsr-2533dhp3

Updated Oct 24, 2026View on NVD →

S4E scanner

criticalProduct Based Web Vulnerabilities~10 seconds

CVE-2021-20090 Scanner

CVE-2021-20090 scanner - Path Traversal vulnerability in Buffalo WSR-2533DHPL2 and Buffalo WSR-2533DHP3

Used 2.3k times · 3.4k assets checked · domain, ipv4, subdomain

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