Cisco Secure Firewall Management Center Software Static Credential Vulnerability
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.
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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh Security Impact Rating: High CVE: CVE-2026-20316
CSIRTS triage
- What
- A vulnerability allows an unauthenticated remote attacker to log in using static credentials.
- Who is affected
- Deployments of Cisco Secure Firewall Management Center Software.
- Urgency
- Remediation is urgent due to the high severity rating and potential access to sensitive data.
- Action
- Update to the latest software version to address this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
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.
- Exploitation confirmedCVE-2026-20316Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 53% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-20316 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedCisco Products Multiple Vulnerabilitieshkcert
- unknownexploitedCisco security advisory (AV26-757)cccs
- medium[NEW] [medium] Cisco Secure Firewall Management Center: Vulnerability allows information disclosurecert-bund
- unknownexploitedNCSC-2026-0271 [1.00] [M/H] Vulnerability fixed in Cisco Secure Firewall Management Centerncsc-nl
- unknownexploitedCisco Secure Firewall Management Center Software Information Disclosure Vulnerabilityhkcert
- unknownexploitedVulnerability in Cisco Firewall Management Center (July 30, 2026)cert-fr-avis
- mediumexploitedCVE-2026-20316: A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software…nvd
- highexploitedCISA Adds One Known Exploited Vulnerability to Catalogcisa
- criticalexploitedCVE-2026-20316: Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerabilitycisa-kev
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.
- highexploitedAL26-018 - Vulnerability affecting Cisco ASA and Secure Firewall Threat Defense Software Remote Access SSL VPN…cccs · 2026-08-13
- unknownexploitedNCSC-2026-0295 [1.00] [M/H] Vulnerability patched in Cisco Secure Firewall ASA and FTD softwarencsc-nl · 2026-08-12
- highexploited[NEW] [high] Cisco ASA (Adaptive Security Appliance) and Secure Firewall Threat Defense: Vulnerability enables…cert-bund · 2026-08-12
- highexploitedCVE-2026-20349: A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Securi…nvd · 2026-08-11
- highexploitedCisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SS…cisco-psirt · 2026-08-11
- criticalexploitedCVE-2026-20349: Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FT…cisa-kev · 2026-08-11
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