CVE record · CVE-2026-20131

Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability

CVSS 10.0 CriticalCriticalIn CISA KEV · ransomwareEPSS 0.44 · 98th percentile

Critical, because:

In CISA’s KEV catalogue since 19 Mar 2026: it is known to be exploited.
CVSS score 10.0: 9.0 or more.
CVSS score 10.0 (7.0 or more) and EPSS 0.44 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: cisco) at 4 Mar 2026, 17:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Cisco	Cisco Secure Firewall Management Center (FMC)	affected 7.0.0 affected 7.0.0.1 affected 7.0.1 affected 7.1.0 affected 6.4.0.13 affected 7.0.1.1 affected 6.4.0.14 affected 7.1.0.1 affected 7.0.2 affected 6.4.0.15 affected 7.2.0 affected 7.0.2.1 and 58 more Other versions: unknown

Identifiers: CVE-2026-20131
CNA: cisco
Weakness (CWE): CWE-502
Tags: Cisco Secure Firewall Management Center (FMC)
Insecure deserialization
Published: 4 Mar 2026
Updated: 14 Aug 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CNA (cisco)

CISA KEV Listed since 19 Mar 2026: known to be exploited. CISA reports use in ransomware campaigns.
EPSS 0.44, the 98th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Mar 2026. New records show when each source confirmed them.

Sources

References from the CNA

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.