CVE-2026-20131

Published: Mar 4, 2026Modified: Jun 17, 2026CISA KEV

10.0

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 6.0

Source: psirt@cisco.com (Secondary)

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.

Affected (71)

Products: Cisco: Secure Firewall Management Center

Cisco

1 product

Secure Firewall Management Center

Configuration A

71 vulnerable

Vulnerable Software	Affected Versions
Cisco Secure Firewall Management Center	Version 10.0.0
Cisco Secure Firewall Management Center	Version 6.4.0.13
Cisco Secure Firewall Management Center	Version 6.4.0.14
Cisco Secure Firewall Management Center	Version 6.4.0.15
Cisco Secure Firewall Management Center	Version 6.4.0.16
Cisco Secure Firewall Management Center	Version 6.4.0.17
Cisco Secure Firewall Management Center	Version 6.4.0.18
Cisco Secure Firewall Management Center	Version 7.0.0.1
Cisco Secure Firewall Management Center	Version 7.0.0
Cisco Secure Firewall Management Center	Version 7.0.1.1
Cisco Secure Firewall Management Center	Version 7.0.1
Cisco Secure Firewall Management Center	Version 7.0.2.1
Cisco Secure Firewall Management Center	Version 7.0.2
Cisco Secure Firewall Management Center	Version 7.0.3
Cisco Secure Firewall Management Center	Version 7.0.4
Cisco Secure Firewall Management Center	Version 7.0.5
Cisco Secure Firewall Management Center	Version 7.0.6.1
Cisco Secure Firewall Management Center	Version 7.0.6.2
Cisco Secure Firewall Management Center	Version 7.0.6.3
Cisco Secure Firewall Management Center	Version 7.0.6
Cisco Secure Firewall Management Center	Version 7.0.7
Cisco Secure Firewall Management Center	Version 7.0.8.1
Cisco Secure Firewall Management Center	Version 7.0.8
Cisco Secure Firewall Management Center	Version 7.1.0.1
Cisco Secure Firewall Management Center	Version 7.1.0.2
Cisco Secure Firewall Management Center	Version 7.1.0.3
Cisco Secure Firewall Management Center	Version 7.1.0
Cisco Secure Firewall Management Center	Version 7.2.0.1
Cisco Secure Firewall Management Center	Version 7.2.0
Cisco Secure Firewall Management Center	Version 7.2.10.1
Cisco Secure Firewall Management Center	Version 7.2.10.2
Cisco Secure Firewall Management Center	Version 7.2.10
Cisco Secure Firewall Management Center	Version 7.2.1
Cisco Secure Firewall Management Center	Version 7.2.2
Cisco Secure Firewall Management Center	Version 7.2.3.1
Cisco Secure Firewall Management Center	Version 7.2.3
Cisco Secure Firewall Management Center	Version 7.2.4.1
Cisco Secure Firewall Management Center	Version 7.2.4
Cisco Secure Firewall Management Center	Version 7.2.5.1
Cisco Secure Firewall Management Center	Version 7.2.5.2
Cisco Secure Firewall Management Center	Version 7.2.5
Cisco Secure Firewall Management Center	Version 7.2.6
Cisco Secure Firewall Management Center	Version 7.2.7
Cisco Secure Firewall Management Center	Version 7.2.8.1
Cisco Secure Firewall Management Center	Version 7.2.8
Cisco Secure Firewall Management Center	Version 7.2.9
Cisco Secure Firewall Management Center	Version 7.3.0
Cisco Secure Firewall Management Center	Version 7.3.1.1
Cisco Secure Firewall Management Center	Version 7.3.1.2
Cisco Secure Firewall Management Center	Version 7.3.1
Cisco Secure Firewall Management Center	Version 7.4.0
Cisco Secure Firewall Management Center	Version 7.4.1.1
Cisco Secure Firewall Management Center	Version 7.4.1
Cisco Secure Firewall Management Center	Version 7.4.2.1
Cisco Secure Firewall Management Center	Version 7.4.2.2
Cisco Secure Firewall Management Center	Version 7.4.2.3
Cisco Secure Firewall Management Center	Version 7.4.2.4
Cisco Secure Firewall Management Center	Version 7.4.2
Cisco Secure Firewall Management Center	Version 7.4.3
Cisco Secure Firewall Management Center	Version 7.4.4
Cisco Secure Firewall Management Center	Version 7.4.5
Cisco Secure Firewall Management Center	Version 7.6.0
Cisco Secure Firewall Management Center	Version 7.6.1
Cisco Secure Firewall Management Center	Version 7.6.2.1
Cisco Secure Firewall Management Center	Version 7.6.2
Cisco Secure Firewall Management Center	Version 7.6.3
Cisco Secure Firewall Management Center	Version 7.6.4
Cisco Secure Firewall Management Center	Version 7.7.0
Cisco Secure Firewall Management Center	Version 7.7.10.1
Cisco Secure Firewall Management Center	Version 7.7.10
Cisco Secure Firewall Management Center	Version 7.7.11

Related CWEs

CWE-502

Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

References (3)

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

Source: psirt@cisco.com

Vendor Advisory

https://aws.amazon.com/blogs/security/amazon-threat-intelligence-teams-identify-interlock-ransomware-campaign-targeting-enterprise-firewalls/

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Technical Description

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

Timeline

No history available yet.