CVE-2026-20316: Cisco Secure Firewall Management Center static credentials in web interface

CVE-2026-20316 · Severity: critical · CVSS 5.3 · Exploited in the wild · Published 2026-07-29

Cisco Secure Firewall Management Center (FMC) is a centralized administrative tool used to manage network security policies and firewall devices. A vulnerability exists where a low-privileged account has a permanent, pre-set password that cannot be changed. An unauthorized person could use these credentials to log into the management interface and view sensitive configuration or system data. While the account has limited permissions, this access could be used as a starting point for more advanced attacks against the network infrastructure.

Technologies: Cisco Secure Firewall Management Center (FMC), Cisco Secure Firewall Management Center Software, Cisco Secure Firewall Management Center. Vendors: Cisco.

Quick answers

Is CVE-2026-20316 exploited in the wild?
Yes. CVE-2026-20316 is known to be exploited in the wild, first recorded on 29 July 2026. Treat it as urgent.
How severe is CVE-2026-20316?
Critical severity, with a CVSS score of 5.3, published 29 July 2026.
Which products and versions are affected?
Cisco Secure Firewall Management Center Software 7.0, 7.2, 7.4, 7.6, 7.7, 10.0; Cisco Secure Firewall Management Center 7.0.0 through 7.4.1.1.
Is there a fix for CVE-2026-20316?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-20316 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-20316?
Check whether you run Cisco Secure Firewall Management Center (FMC), Cisco Secure Firewall Management Center Software or Cisco Secure Firewall Management Center at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software (CWE-259) is caused by the presence of static user credentials for a low-privileged account. An unauthenticated, remote attacker can exploit this by logging into the affected system using these hard-coded credentials. While the initial access is limited to low-privileged data, Cisco has elevated the internal Security Impact Rating to High because this access can be chained with other vulnerabilities to achieve privilege escalation. The attack surface is significantly reduced if the FMC management interface is not exposed to the public internet. Patch information is available via the official Cisco security advisory.

Affected products

  • Cisco Secure Firewall Management Center (FMC) 7.0.0 through 7.4.1.1

Timeline

  • 2026-07-29: disclosed
  • 2026-07-29: advisory

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