Oct 19, 2026 · 16:51 UTC SEARCH
UNRATED KNOWN EXPLOITED RANSOMWARE USE
Vulnerability intelligence

CVE-2026-20131

VendorCisco
ProductSecure Firewall Management Center (FMC)
Known exploitedYes
Added to CISA KEVMarch 19, 2026
KEV due dateMarch 22, 2026
Known ransomware useKnown

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.

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.

CISA KEV status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities Catalog. Known ransomware campaign use: Known.

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