CVE-2026-20052

A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a logic error in memory management when a device is performing Snort 3 SSL packet inspection. An attacker could exploit this vulnerability by sending crafted SSL packets through an established connection to be parsed by the Snort 3 Detection Engine. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.

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-ftd-snort3ssl-FBEKYXpH

Configurations

No configuration.

History

17 Jun 2026, 10:16

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad en el manejo de la gestión de memoria para el Motor de Detección Snort 3 del software Cisco Secure Cortafuegos Defensa contra Amenazas (FTD) podría permitir a un atacante remoto no autenticado causar que el Motor de Detección Snort 3 se reinicie. Esta vulnerabilidad se debe a un error de lógica en la gestión de memoria cuando un dispositivo está realizando inspección de paquetes SSL de Snort 3. Un atacante podría explotar esta vulnerabilidad enviando paquetes SSL manipulados a través de una conexión establecida para ser analizados por el Motor de Detección Snort 3. Un exploit exitoso podría permitir al atacante causar una condición de denegación de servicio (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 10:16

NVD link : CVE-2026-20052

Mitre link : CVE-2026-20052

CVE.ORG link : CVE-2026-20052

JSON object : View

Products Affected

No product.

CWE

CWE-788

Access of Memory Location After End of Buffer

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