CVE-2026-20131
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability
10.0
CVSS 3.1
42.7 %
EPSS (current)
2026-03-19
KEV addition
Yes
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Cisco / Secure Firewall Management Center (FMC)
Published: 2026-03-04 · Due (CISA): 2026-03-22
CWE: CWE-502 · EU list: no
Exploit references (metadata only)
No public exploit references recorded.