CVE-2026-20221

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

CVE-2026-20221 Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

CVE-2026-20221

Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine 's generic routing encapsulation (GRE) tunnel decapsulation feature. The root cause is the improper handling of nested GRE traffic , which allows an unauthenticated, remote attacker to send a crafted GRE paylo...

EUVD-2026-107378

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...