CVE-2026-20316

Cisco Secure Firewall Management Center Software Static Credential Vulnerability

CVSS 5.3 medium · Cisco Cisco Secure Firewall Management Center (FMC) · published 2026-07-29

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems. This vulnerability is due to the presence of static user credentials for a low-privileged account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.  Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.   Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges.

NVD · CVE.org

Coverage 2 sources

1. 2026-07-29 CISA Cybersecurity Advisories high CISA Adds One Known Exploited Vulnerability to Catalog

   CISA added CVE-2026-20316, a Cisco Secure Firewall Management Center vulnerability with a hard-coded password, to its Known Exploited Vulnerabilities Catalog.

2. 2026-07-30 Help Net Security high Cisco FMC static credentials exploited by attackers (CVE-2026-20316)

   CISA warns that attackers are exploiting a static credentials vulnerability in Cisco Secure Firewall Management Center (FMC).

3. 2026-09-10 Help Net Security critical Cisco FMC bugs exploited by nation-state and ransomware actors (CVE-2026-20079, CVE-2026-20316)

   Cisco FMC vulnerabilities CVE-2026-20079 and CVE-2026-20316 are under active exploitation by nation-state and ransomware actors.

Mentioned with

CVE-2026-20079

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