CVE-2026-20131 added to CISA KEV: Cisco Secure Firewall Management Center (FMC)
Status: ✅ Confirmed exploited in the wild
Date added: 2026-03-19
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due date: 2026-03-22
Why this matters
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 unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.
Sources
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