CVE-2026-20058

Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition.

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-snort3-vbavuls-96UcVVed

Configurations

No configuration.

History

17 Jun 2026, 10:16

Type	Values Removed	Values Added
Summary		(es) Múltiples productos Cisco se ven afectados por vulnerabilidades en la característica VBA de Snort 3 que podrían permitir a un atacante remoto no autenticado provocar la caída del motor de detección de Snort 3. Estas vulnerabilidades se deben a una comprobación de errores incorrecta al descomprimir datos VBA. Un atacante podría explotar estas vulnerabilidades enviando datos VBA manipulados al motor de detección de Snort 3 en el dispositivo objetivo. Un exploit exitoso podría permitir al atacante provocar que el motor de detección de Snort 3 se reinicie inesperadamente, causando una condición de DoS.

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-2026-20058

Mitre link : CVE-2026-20058

CVE.ORG link : CVE-2026-20058

JSON object : View

Products Affected

No product.

CWE

CWE-786

Access of Memory Location Before Start of Buffer

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An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition."}, {"lang": "es", "value": "M\u00faltiples productos Cisco se ven afectados por vulnerabilidades en la caracter\u00edstica VBA de Snort 3 que podr\u00edan permitir a un atacante remoto no autenticado provocar la ca\u00edda del motor de detecci\u00f3n de Snort 3.\n\nEstas vulnerabilidades se deben a una comprobaci\u00f3n de errores incorrecta al descomprimir datos VBA. Un atacante podr\u00eda explotar estas vulnerabilidades enviando datos VBA manipulados al motor de detecci\u00f3n de Snort 3 en el dispositivo objetivo. Un exploit exitoso podr\u00eda permitir al atacante provocar que el motor de detecci\u00f3n de Snort 3 se reinicie inesperadamente, causando una condici\u00f3n de DoS."}], "lastModified": "2026-06-17T10:16:59.843", "sourceIdentifier": "psirt@cisco.com"}