www.cisa.gov 3/19/2026, 5:36:20 PM · via preferred

CISA Adds One Known Exploited Vulnerability to Catalog

CyberSIXT Evidence Panel
CVE Intel
CISA KEV Not in KEV
Patch Patch Available

ACCORDING to CISA, on March 19, 2026, one new vulnerability has been added to its Known Exploited Vulnerabilities (KEV) Catalog based on evidence of active exploitation. The entry is CVE-2026-20131, named 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.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known CVEs that carry significant risk to the federal enterprise. Although BOD 22-01 applies to Federal Civilian Executive Branch agencies, CISA urges all organisations to prioritise timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice.

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