CVE-2026-20316

Published Jul 29, 2026

Last updated a month ago

Exploit known CVSS medium 5.3

Zero-day

Cisco Secure Firewall Management Center

Cisco FMC Software

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-20316 describes a vulnerability found in the web interface of Cisco Secure Firewall Management Center (FMC) Software. This flaw stems from the inclusion of static user credentials for a low-privileged account within the system. An unauthenticated, remote attacker can exploit this vulnerability by utilizing these static credentials to log into an affected device. Successful exploitation grants the attacker access to sensitive data accessible by the low-privileged user account. While the vulnerability provides low-level access, it can potentially be combined with other Cisco Secure FMC Software vulnerabilities to achieve elevated privileges. The attack surface for this vulnerability is reduced if the FMC management interface lacks public internet access. This vulnerability has been actively exploited in zero-day attacks.

Description: 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.
Source: psirt@cisco.com
NVD status: Analyzed
Products: secure_firewall_management_center

Risk scores

CVSS 3.1

Type: Secondary
Base score: 5.3
Impact score: 1.4
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Severity: MEDIUM

Known exploits

Data from CISA

Vulnerability name: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability
Exploit added on: Jul 29, 2026
Exploit action due: Aug 1, 2026
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Weaknesses

psirt@cisco.com: CWE-259

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "7DFD0173-E045-4EF0-BC97-45BBFCFA1502",
            "versionEndIncluding": "7.0.9",
            "versionStartIncluding": "7.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "9DBBB745-D7D2-4E11-ACC7-CE880B066D1E",
            "versionEndIncluding": "7.2.11",
            "versionStartIncluding": "7.2.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "5CA67B3C-60F2-4373-81B6-FCA063518CB1",
            "versionEndIncluding": "7.3.1.2",
            "versionStartIncluding": "7.3.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "CD49AB20-6E0A-4C1A-A775-D2EEA55D45D8",
            "versionEndIncluding": "7.4.7",
            "versionStartIncluding": "7.4.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "9340872F-6A25-467A-BC63-957E1B7E817D",
            "versionEndIncluding": "7.6.5",
            "versionStartIncluding": "7.6.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "BF37EF84-93E8-4D2F-BFEF-7754B74D1E3F",
            "versionEndIncluding": "7.7.12",
            "versionStartIncluding": "7.7.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:cisco:secure_firewall_management_center:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "7A5384FA-2700-4284-8AAD-27B8923732F3",
            "versionEndIncluding": "10.0.1",
            "versionStartIncluding": "10.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.