CVE-2026-20316
MEDIUMCISA KEVDescription
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.
How to fix
Actively exploited, no published fix found yet
Federal remediation due: 2026-08-01
Mitigation guidance may be in the linked vendor advisories in the References section below.
TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 53% of all known CVEs.
Remediation due: 2026-08-01
References
Related Vulnerabilities
Other CWE-259 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-5222 | Medium | 6.3 | 75% | - | - |
| CVE-2024-7332 | Critical | 9.8 | 21% | - | - |
| CVE-2012-5862 | High | 10.0 | 12% | - | - |
| CVE-2023-51629 | High | 8.8 | 3.9% | - | Fix |
| CVE-2025-8730 | Critical | 9.8 | 3.2% | - | - |
| CVE-2023-2645 | Critical | 9.8 | 3.2% | - | - |
Common questions
How do I fix CVE-2026-20316?
No published fix for CVE-2026-20316 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2026-08-01. Apply the vendor's mitigations per CISA's guidance.
Is CVE-2026-20316 being actively exploited?
Yes. CVE-2026-20316 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2026-08-01. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2026-20316?
CVE-2026-20316 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
Embed a live status badge for CVE-2026-20316
Markdown
[](https://tridentstack.com/cve/CVE-2026-20316)HTML
<a href="https://tridentstack.com/cve/CVE-2026-20316"><img src="https://tridentstack.com/cve/badge/CVE-2026-20316.svg" alt="CVE-2026-20316"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-01.