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...

CVE-2026-20197 Multiple Cisco Products Snort 3 Teredo Protocol Denial of Service Vulnerability

Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo 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...

EUVD-2026-107376

Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo 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...

CVE-2026-20197 Multiple Cisco Products Snort 3 Teredo Protocol Denial of Service Vulnerability

Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo 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...

CVE-2026-20197

Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo Detection Engine due to incomplete error checking during the parsing of Teredo packets. An unauthenticated, remote attacker could exploit this by sending a crafted Teredo packet to a targeted device, causing the Snort 3...

CVE-2026-20179 Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities

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...

EUVD-2026-107373

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...

CVE-2026-20179 Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities

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...

CVE-2026-20179

Multiple Cisco products are impacted by a vulnerability in the Snort 3 Generic Routing Encapsulation (GRE) Detection Engine . The root cause is incomplete error checking during the parsing of GRE packets. An unauthenticated, remote attacker can exploit this by sending a crafted GRE packet to a ta...

CVE-2026-20019 Multiple Cisco Products Snort 3 Netflow Denial of Service Vulnerabilities

Multiple Cisco products are affected by a vulnerability in the Snort 3 NetFlow 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...

CVE-2026-20019 Multiple Cisco Products Snort 3 Netflow Denial of Service Vulnerabilities

Multiple Cisco products are affected by a vulnerability in the Snort 3 NetFlow 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...

CVE-2026-20019

Multiple Cisco products are affected by a Denial of Service (DoS) vulnerability in the Snort 3 NetFlow Detection Engine . The root cause is incomplete error checking during the parsing of UDP Netflow Protocol packets . An unauthenticated, remote attacker can exploit this by sending a single craft...

EUVD-2026-107371

Multiple Cisco products are affected by a vulnerability in the Snort 3 NetFlow 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...

EUVD-2026-107370

Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed...

Multiple Cisco Products Snort 3 Denial of Service Vulnerabilities

Multiple Cisco products are affected by vulnerabilities in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service DoS condition. For more information about these...

Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerability

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...

Multiple Cisco Products Snort 3 Denial of Service Vulnerability

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...

Multiple Cisco Products Snort 3 SMTP MIME Denial of Service Vulnerability

Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed...

PT-2026-120702

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A memory management issue exists in the Snort 3 Detection Engine due to incomplete error checking during file processing. This flaw can lead to unreleased memory, which an...

PT-2026-120690

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A flaw in the Snort 3 Detection Engine allows an unauthenticated remote attacker to cause a denial of service DoS condition. The issue occurs during the processing of General Packet...