Cisco FTD: CVE-2026-20197: Multiple Cisco Products Snort 3 Denial of Service Vulnerabilities

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...

Cisco FTD: CVE-2026-20011: 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...

Multiple Cisco Products Snort 3 DoS Vulnerabilities (cisco-sa-snort3-misc-dos-6mB22qAK_CVE-2026-76489)

According to its self-reported version, Cisco ASA Software is affected by a vulnerability. - Multiple Cisco products are affected by a vulnerability in the memory management implementation of Snort 3 that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to...

Cisco FTD: CVE-2026-20019: Multiple Cisco Products Snort 3 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...

PT-2026-120679

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A flaw exists in the Snort 3 SMTP MIME Decoder due to insufficient error checking during the parsing of MIME fields within the SMTP header. An unauthenticated remote attacker can explo...

PT-2026-120683

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A flaw exists in the Snort 3 Teredo Detection Engine due to incomplete error checking during the parsing of Teredo packets. An unauthenticated remote attacker can exploit this by sendi...

PT-2026-120685

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A flaw exists in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine. The issue stems from improper handling of nested GRE traffic, which...

Cisco FTD: CVE-2026-76445: 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...

Cisco FTD: CVE-2026-20221: 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...

Cisco FTD: CVE-2026-20179: Multiple Cisco Products Snort 3 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...

Multiple Cisco Products Snort 3 DoS Vulnerabilities (cisco-sa-snort3-misc-dos-6mB22qAK_CVE-2026-20019_CVE-2026-20179_CVE-2026-20197)

According to its self-reported version, Cisco ASA Software is affected by multiple 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...

PT-2026-120682

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A flaw exists in the Snort 3 Generic Routing Encapsulation GRE Detection Engine due to incomplete error checking during the parsing of GRE packets. An unauthenticated remote attacker c...

PT-2026-120680

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...

Cisco FTD: CVE-2026-76489: Multiple Cisco Products Snort 3 Denial of Service Vulnerabilities

Multiple Cisco products are affected by a vulnerability in the memory management implementation of Snort 3 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...

Multiple Cisco Products Snort 3 DoS (cisco-sa-snort3-gtpcodec-dos-Rmecfepz)

According to its self-reported version, Cisco ASA Software is affected by a 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, resultin...

Multiple Cisco Products Snort 3 Generic Routing Encapsulation DoS (cisco-sa-snort3-gre-JNpMHrTv)

According to its self-reported version, Cisco ASA Software is affected by a 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...

Multiple Cisco Products Snort 3 SMTP MIME DoS (cisco-sa-snort3-mime-vulns-bkXjcKkt)

According to its self-reported version, Cisco ASA Software is affected by a 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...

Cisco Cyber Vision Improper Exception Handling Vulnerabilities

Cisco Cyber Vision has a vulnerability in exception handling. This vulnerability stems from the GRE tunnel decapsulation function in the Snort 3 Detection Engine, which improperly processes nested GRE traffic. Unauthenticated remote attackers can send custom GRE payloads through the affected...

Cisco Open Source Snort3 Resource Management Error Vulnerability

Several affected versions of Cisco Open Source Snort3, Cisco Secure Firewall Threat Defense FTD software, and Cisco UTD SNORT IPS Engine software have a resource management vulnerability. This vulnerability stems from incomplete error checking during Snort 3’s parsing of UDP NetFlow protocol...

Cisco Open Source Snort3 Resource Management Error Vulnerability

Cisco Open Source Snort3 has a resource management vulnerability. This vulnerability stems from logical flaws in the codec used by the Snort 3 detection engine when processing GTP extension headers. Unauthenticated remote attackers can send specially crafted fragmented UDP packets, causing the...