CVE-2026-20316: in the CISA KEV catalogue
Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability. CISA added CVE-2026-20316 to the Known Exploited Vulnerabilities catalogue on 2026-07-29 with a default due date of 2026-08-01. Known ransomware campaign use: Known. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- Cisco Secure Firewall Management Center (FMC)
- CWE
- CWE-259
- CISA 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.
- EPSS
- 35%, percentile 98 (scored 2026-11-03)
EPSS puts about 35 in 100 odds (35%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 98% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-20316
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2026-20316 in the CISA KEV catalogue?
Yes. CISA added CVE-2026-20316 (Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-07-29. CISA's default due date for it is 2026-08-01.
Is CVE-2026-20316 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2026-20316.
What should I do about CVE-2026-20316?
CISA's 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.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2026-20316