CVE-2026-20316KEV · OVERDUECWE-259

Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability

Medium · published July 29, 2026

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 5.3. It is confirmed in active exploitation. It sits in the 98.4th percentile for exploit probability.

84
days past CISA
deadline
CVSS v3.1
5.3
EPSS
35%
Percentile
98.4
In the wild
Confirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.35096 · 98.4th percentile
Weakness
CWE-259 · Use of Hard-coded Password
Published
2026-07-29T21:16Z
KEV added
2026-07-29 · due 2026-08-01
Affected products (7)
ProductVersionsFixed in
cisco/secure_firewall_management_center≥ 7.0.0, ≤ 7.0.9—
cisco/secure_firewall_management_center≥ 7.2.0, ≤ 7.2.11—
cisco/secure_firewall_management_center≥ 7.3.0, ≤ 7.3.1.2—
cisco/secure_firewall_management_center≥ 7.4.0, ≤ 7.4.7—
cisco/secure_firewall_management_center≥ 7.6.0, ≤ 7.6.5—
cisco/secure_firewall_management_center≥ 7.7.0, ≤ 7.7.12—
cisco/secure_firewall_management_center≥ 10.0.0, ≤ 10.0.1—
References (2)
EPSS history
Timeline
  • 25 SEP 03:24Z
    EPSS moved 11% → 35%
    epss
  • 29 JUL 16:22Z
    Cisco Secure Firewall Management Center Software Static Credential Vulnerability
    cvelistv5
  • 29 JUL 00:00Z
    Added to CISA KEV — remediate by Aug 1
    kev