Exploited vulnerability

CVE-2026-76418

TLP:CLEAR

Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability

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.

Facts

Vendor: Cisco
Product: Secure Firewall ASA Software and Cisco Secure FTD Software
CVSS: 8.6
EPSS (probability of exploitation within 30 days): 0.8 %
On CISA's Known Exploited Vulnerabilities list since: 29 October 2026
First known exploitation: 28 October 2026
CISA's deadline for US federal agencies: 1 November 2026
Weakness: CWE-690
First seen by Risk Letters: 29 October 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD