cbcvebase.
CVE-2026-20179
published 2026-10-21

CVE-2026-20179: Multiple Cisco products are affected by a vulnerability in the Snort 3 Generic Routing Encapsulation (GRE) Detection Engine that could allow an…

PriorityP336medium5.8CVSS 3.1
AVNACLPRNUINSCCNINAL
EPSS
0.39%
31.9th percentile
Multiple Cisco products are affected by a vulnerability in the Snort 3 Generic Routing Encapsulation (GRE) Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete error checking when Snort 3 parses GRE packets. An attacker could exploit this vulnerability by sending a crafted GRE packet to a targeted device to be parsed by Snort. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.

Affected

203 ranges· showing 25
VendorProductVersion rangeFixed in
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