CVE-2026-76418
Unchecked Return Value to NULL Pointer Dereference in Cisco Secure Firewall ASA Software and Cisco Secure FTD Software. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 29 October 2026.
- Product
- Cisco Secure Firewall ASA Software and Cisco Secure FTD Software
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
Cisco Secure Firewall ASA Software and Cisco Secure FTD Software contains an unchecked return value to NULL pointer dereference vulnerability that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
More from Cisco this year.
- 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-2026-20316 Secure Firewall Management Center Use of Hard-coded Password, 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.