CVE-2026-20065

Multiple Cisco products are affected by a vulnerability in the Snort 3 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 an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.

CVSS v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz

Configurations

No configuration.

History

17 Jun 2026, 10:17

Type	Values Removed	Values Added
Summary		(es) Múltiples productos Cisco se ven afectados por una vulnerabilidad en el motor de detección Snort 3 que podría permitir a un atacante remoto no autenticado provocar que el motor de detección Snort 3 se reinicie, lo que resultaría en una interrupción de la inspección de paquetes. Esta vulnerabilidad se debe a un error en la lógica de inicialización del módulo 'binder' del motor de detección Snort. Un atacante podría explotar esta vulnerabilidad al enviar ciertos paquetes a través de una conexión establecida que es analizada por Snort 3. Un exploit exitoso podría permitir al atacante provocar una condición de DoS cuando el motor de detección Snort 3 se reinicia inesperadamente.

04 Mar 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-04 18:16

Updated : 2026-06-17 10:17

NVD link : CVE-2026-20065

Mitre link : CVE-2026-20065

CVE.ORG link : CVE-2026-20065

JSON object : View

Products Affected

No product.

CWE

CWE-667

Improper Locking

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{"status": "affected", "version": "17.9.7a"}, {"status": "affected", "version": "17.15.3a"}, {"status": "affected", "version": "17.15.3"}, {"status": "affected", "version": "17.12.5b"}, {"status": "affected", "version": "17.12.5c"}, {"status": "affected", "version": "17.15.4"}, {"status": "affected", "version": "17.9.7b"}, {"status": "affected", "version": "17.18.1"}, {"status": "affected", "version": "17.18.1a"}, {"status": "affected", "version": "17.12.6"}, {"status": "affected", "version": "17.9.8"}, {"status": "affected", "version": "17.15.4c"}, {"status": "affected", "version": "17.12.5d"}, {"status": "affected", "version": "17.18.2"}], "defaultStatus": "unknown"}]}], "published": "2026-03-04T18:16:21.350", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz", "source": "psirt@cisco.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-667"}]}], "descriptions": [{"lang": "en", "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 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.\r\n\r\nThis vulnerability is due to an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly."}, {"lang": "es", "value": "M\u00faltiples productos Cisco se ven afectados por una vulnerabilidad en el motor de detecci\u00f3n Snort 3 que podr\u00eda permitir a un atacante remoto no autenticado provocar que el motor de detecci\u00f3n Snort 3 se reinicie, lo que resultar\u00eda en una interrupci\u00f3n de la inspecci\u00f3n de paquetes.\n\nEsta vulnerabilidad se debe a un error en la l\u00f3gica de inicializaci\u00f3n del m\u00f3dulo 'binder' del motor de detecci\u00f3n Snort. Un atacante podr\u00eda explotar esta vulnerabilidad al enviar ciertos paquetes a trav\u00e9s de una conexi\u00f3n establecida que es analizada por Snort 3. Un exploit exitoso podr\u00eda permitir al atacante provocar una condici\u00f3n de DoS cuando el motor de detecci\u00f3n Snort 3 se reinicia inesperadamente."}], "lastModified": "2026-06-17T10:17:00.680", "sourceIdentifier": "psirt@cisco.com"}