CVE-2026-76445 Multiple Cisco Products Snort 3 Denial of Service Vulnerability
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-76445?
CVE-2026-76445 is a medium-severity vulnerability in Cisco Open Source Snort3, published on 21 Oct 2026.
Official description
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the detection engine to unexpectedly restart, resulting in a denial of service (DoS) condition. The vulnerability is due to a flaw in logic handling when General Packet Radio Service (GPRS) Tunneling Protocol (GTP) extension headers are processed within the codec. An attacker could exploit this vulnerability by sending a crafted, fragmented UDP datagram that contains these headers to the Snort 3 Detection Engine of an affected device. A successful exploit could allow the attacker to cause the detection engine to enter an infinite loop, resulting in a DoS condition.
Weakness: CWE-835
Which versions are affected by CVE-2026-76445?
How do I fix CVE-2026-76445?
No fix has been published for CVE-2026-76445 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76445 being exploited?
There is no known exploitation of CVE-2026-76445 in the wild and no public exploit code.
Sources
Also known as GHSA-5cgp-9338-jh6r.