Cisco Secure Firewall Management Center (FMC): Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management
› Cisco Secure Firewall Management Center (FMC)
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- started
- Mar 19, 2026
- closed
- Mar 19, 2026
- CVEs
- 1
- sources
- 3
## summary
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. Added to CISA KEV on 2026-03-19.
severity: Actively exploited (CISA KEV); known ransomware use
## cve ids[1]
## affected
- See vendor advisory / CISA notes (versions not always listed in KEV feed)
## fixed in
- See vendor advisory linked in sources
## timeline[1]
CISA added CVE-2026-20131 to the KEV catalog (due 2026-03-22).
## advisories[3]
## notes & caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).
