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CVE-2026-20131

Severity
CRITICAL
CVSS
10.0
EPSS
0.28158
Risk score
74.86
CISA KEV
Yes
PoC
Yes
Published
2026-03-04
Modified
2026-03-25
First seen
2026-08-07
Aliases
EUVD-2026-9444, GHSA-R229-MJ76-G2QX
Products
Cisco:Cisco Secure Firewall Management Center (FMC) 10.0.0, Cisco:Cisco Secure Firewall Management Center (FMC) 6.4.0.13, Cisco:Cisco Secure Firewall Management Center (FMC) 6.4.0.14, Cisco:Cisco Secure Firewall Management Center (FMC) 6.4.0.16, Cisco:Cisco Secure Firewall Management Center (FMC) 6.4.0.17, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.0, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.0.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.1.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.2.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.3, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.5, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.6, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.6.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.6.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.6.3, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.7, Cisco:Cisco Secure Firewall Management Center (FMC) 7.0.8.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.0, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.0.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.10, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.10.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.3, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.3.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.4, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.5, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.5.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.8, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.8.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.2.9, Cisco:Cisco Secure Firewall Management Center (FMC) 7.3.0, Cisco:Cisco Secure Firewall Management Center (FMC) 7.3.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.3.1.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.3.1.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.0, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.1.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.2.3, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.2.4, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.4, Cisco:Cisco Secure Firewall Management Center (FMC) 7.4.5, Cisco:Cisco Secure Firewall Management Center (FMC) 7.6.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.6.2, Cisco:Cisco Secure Firewall Management Center (FMC) 7.6.2.1, Cisco:Cisco Secure Firewall Management Center (FMC) 7.6.4, Cisco:Cisco Secure Firewall Management Center (FMC) 7.7.0, Cisco:Cisco Secure Firewall Management Center (FMC) 7.7.10, Cisco:Cisco Secure Firewall Management Center (FMC) 7.7.11, Cisco:Secure Firewall Management Center (FMC)
Sources
euvd EUVD-2026-9444
cisa.gov CVE-2026-20131
packetstorm e1b15243aca2ad53b47ce4cf|CVE-2026-20131

Description

A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.

References