Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability
Cisco · Secure Firewall Management Center (FMC)
Date added (CISA)
2026-03-19
Remediation due
2026-03-22
Known ransomware use
Yes
Remediation priority
P1 — known ransomware use · past CISA due date
ATT&CK mapping
No ATT&CK mapping yet
The CTID Mappings Explorer hasn't published an exploitation/impact technique mapping for this CVE yet.
CVE-2026-20131: Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability · RaqibCTI