Arcadyan Buffalo Firmware Path Traversal Vulnerability (CVE-2021-20090)
Severity: critical · Patch status: patched · Since 2021-11-03 · CVE-2021-20090
Arcadyan Buffalo firmware contains a path traversal vulnerability that could allow unauthenticated, remote attackers to bypass authentication and access sensitive information. This vulnerability affects multiple routers across several different vendors. CISA added CVE-2021-20090 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Nov 17, 2021 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
