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CVE-2026-20316: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability

criticalknown exploitedCVE-2026-20316
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Cisco Secure Firewall Management Center (FMC) formerly known as Firepower Management Center contains a use of hard-coded password vulnerability that 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.

CSIRTS triage

vendor: Ciscoproduct: Secure Firewall Management CenterAuthentication bypassInformation disclosure
What
The product contains a hard-coded password vulnerability that allows an unauthenticated remote attacker to log in using a low-privileged account.
Who is affected
Deployments of Cisco Secure Firewall Management Center Software with the vulnerability present.
Urgency
Remediation is critical as the vulnerability is actively exploited and poses a significant risk to sensitive data.
Action
Update to the latest version of Cisco Secure Firewall Management Center Software to address the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2026-07-29
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-20316

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-20316coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Cisco Secure Firewall

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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