# CVE-2021-20090: A Arcadyan Buffalo Firmware bug is being used in attacks

Status: Being used now (CISA KEV, added 2021-11-03)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Arcadyan Buffalo Firmware (CVE-2021-20090) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2021-20090. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
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.

## Sources
- https://nvd.nist.gov/vuln/detail/CVE-2021-20090
- https://nvd.nist.gov/vuln/detail/CVE-2021-20090

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.