# CVE-2026-20131: A Cisco Secure Firewall Management Center (FMC) bug is being used in attacks

Status: Being used now (CISA KEV, added 2026-03-19)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Cisco Secure Firewall Management Center (FMC) (CVE-2026-20131) 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-2026-20131. 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
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain a deserialization of untrusted data vulnerability in the web-based management interface that could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.

## Sources
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh
- https://nvd.nist.gov/vuln/detail/CVE-2026-20131
- https://nvd.nist.gov/vuln/detail/CVE-2026-20131

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