CISA adds one known exploited vulnerability to catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation:

CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability.

This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise.