CVE-2026-20316
Secure Firewall Management Center Use of Hard-coded Password in Cisco Secure Firewall Management Center (FMC). CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 29 July 2026.
- Product
- Cisco Secure Firewall Management Center (FMC)
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- Known to be used in ransomware
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
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.
More from Cisco this year.
- CVE-2026-76418 Unchecked Return Value to NULL Pointer Dereference, added
- CVE-2026-76519 Relative Path Traversal, added
- CVE-2026-76504 Hex Encoding, added
- CVE-2026-76460 Incorrect Use of Privileged APIs, added
- CVE-2026-76461 SQL Injection, added
- CVE-2026-20079 Firewall Management Center Authentication Bypass Using an Alternate Path or Channel, added
- CVE-2026-20349 Heap Inspection, added
- CVE-2008-4128 Cross-Site Request Forgery, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.