🛡 CVE-2026-20131
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) CWE-502
Ransomware use
KNOWN
CISA KEV
EPSS
28.2%
Elevated · 98th pct
Added to KEV
2026-03-19
CISA
Remediate by
2026-03-22
⚠ OVERDUE
CWE
CWE-502
weakness
📈 EPSS exploit probability
28.2%
FIRST EPSS — 30-day probability of exploitation in the wild · band Elevated · higher than 98% of all scored CVEs
⚠ KEV remediation overdue
CISA required federal remediation by 2026-03-22. This exploited vulnerability is past its Binding Operational Directive 22-01 due date — prioritize patch/mitigation and hunt for exploitation.
📄 Description
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain a deserialization of untrusted data vulnerability in the web-based management interface that could allow an unauthenti
🏹 Attributed exploitation
Malware / ransomware (KEV): ransomware (KEV-flagged)
🔗 External references & OSINT
🔄 Internal pivots & actions
🛡 Add to case
🧩 Advanced Capabilities
Workstation · Copilot · AI Skills · Automation · Playbooks · Lookups · Docs · Reports
🤖 AI Copilot
⚡ AI Skills
🔍 Lookup & Enrich
📚 Docs & Reports
💡 Recommendations
- Explore related tools below
- Automate recurring work via cron