All vulnerabilities
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)Network & edge
Open in ThreatlineRecord JSON
CVSS
10.0Critical
ExploitationExploited in the wildAdded to KEV 19 Mar 2026. Known ransomware useCISA KEV
Exploit odds (EPSS)43.2%Chance of exploitation activity in the next 30 days, higher than 98% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline22 Mar 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply 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

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 4 Mar 2026, 17:17 UTCPublishedCVE List
  2. 19 Mar 2026Added to CISA KEVCISA KEV

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 unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.

Text from CVE List

Affected versions 30

  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.0CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.0.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.1.0CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 6.4.0.13CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.1.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 6.4.0.14CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.1.0.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.2CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 6.4.0.15CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.0CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.2.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.3CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.1.0.2CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.0.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.4CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.5CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 6.4.0.16CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.3.0CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.2CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.3.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.3CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.1.0.3CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.3.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.4CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.0.6CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.4.1CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.2.5CVE List
  • Cisco Secure Firewall Management Center (FMC)affected: 7.3.1.1CVE List

References 4