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CRITICAL
Vulnerabilities
CVE-2026-20131: Cisco FMC/SCC Deserialization Vulnerability Under Active Attack
CISA adds CVE-2026-20131, a critical deserialization vulnerability in Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC), to KEV Catalog due
Runtime Rebel Intel
4 min read·Mar 20, 2026
CRITICAL
Malware
CVE-2026-20131: Interlock Ransomware Exploits Cisco FMC — Patch Now
Interlock ransomware actors are exploiting CVE-2026-20131, a critical 10.0 CVSS zero-day in Cisco FMC, to gain unauthenticated root access and deploy malware.
Runtime Rebel Intel
3 min read·Mar 18, 2026