CVE-2026-20057

Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.    This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 a denial of service (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 una vulnerabilidad en la característica de Visual Basic para Aplicaciones (VBA) de Snort 3 que podría permitir a un atacante remoto no autenticado causar la caída del motor de detección de Snort 3. Esta vulnerabilidad se debe a la falta de una comprobación de errores adecuada al descomprimir datos VBA. Un atacante podría explotar esta vulnerabilidad enviando datos VBA manipulados al motor de detección de Snort 3 en el dispositivo objetivo. Un exploit exitoso podría permitir al atacante causar que el motor de detección de Snort 3 se reinicie inesperadamente, provocando una condición de denegación de servicio (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-2026-20057

Mitre link : CVE-2026-20057

CVE.ORG link : CVE-2026-20057

JSON object : View

Products Affected

No product.

CWE

CWE-369

Divide By Zero

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{"status": "affected", "version": "3.0.2"}, {"status": "affected", "version": "3.0.3"}, {"status": "affected", "version": "3.0.1"}, {"status": "affected", "version": "3.1.0"}, {"status": "affected", "version": "3.0.4"}, {"status": "affected", "version": "3.1.1"}, {"status": "affected", "version": "3.1.2"}, {"status": "affected", "version": "3.2.0"}, {"status": "affected", "version": "3.0.5"}, {"status": "affected", "version": "3.2.1"}, {"status": "affected", "version": "3.0.6"}, {"status": "affected", "version": "3.2.2"}, {"status": "affected", "version": "3.2.3"}, {"status": "affected", "version": "3.2.4"}, {"status": "affected", "version": "4.0.0"}, {"status": "affected", "version": "4.0.1"}, {"status": "affected", "version": "4.0.2"}, {"status": "affected", "version": "4.0.3"}, {"status": "affected", "version": "4.1.0"}, {"status": "affected", "version": "4.1.1"}, {"status": "affected", "version": "4.1.2"}, {"status": "affected", "version": "4.1.3"}, {"status": "affected", 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"affected", "version": "5.1.1"}, {"status": "affected", "version": "5.1.2"}, {"status": "affected", "version": "5.1.3"}, {"status": "affected", "version": "5.2.0"}, {"status": "affected", "version": "5.2.1"}, {"status": "affected", "version": "5.3.0"}, {"status": "affected", "version": "5.3.1"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Secure Firewall Threat Defense (FTD) Software", "versions": [{"status": "affected", "version": "7.2.0"}, {"status": "affected", "version": "7.2.0.1"}, {"status": "affected", "version": "7.2.1"}, {"status": "affected", "version": "7.3.0"}, {"status": "affected", "version": "7.2.2"}, {"status": "affected", "version": "7.2.3"}, {"status": "affected", "version": "7.3.1"}, {"status": "affected", "version": "7.2.4"}, {"status": "affected", "version": "7.2.5"}, {"status": "affected", "version": "7.2.4.1"}, {"status": "affected", "version": "7.3.1.1"}, {"status": "affected", "version": "7.4.0"}, {"status": "affected", "version": "7.2.5.1"}, {"status": "affected", "version": "7.4.1"}, {"status": "affected", "version": "7.2.6"}, {"status": "affected", "version": "7.4.1.1"}, {"status": "affected", "version": "7.2.7"}, {"status": "affected", "version": "7.2.5.2"}, {"status": "affected", "version": "7.3.1.2"}, {"status": "affected", "version": "7.2.8"}, {"status": "affected", "version": "7.6.0"}, {"status": "affected", "version": "7.4.2"}, {"status": "affected", "version": "7.2.8.1"}, {"status": "affected", "version": "7.4.2.1"}, {"status": "affected", "version": "7.2.9"}, {"status": "affected", "version": "7.7.0"}, {"status": "affected", "version": "7.4.2.2"}, {"status": "affected", "version": "7.2.10"}, {"status": "affected", "version": "7.6.1"}, {"status": "affected", "version": "7.4.2.3"}, {"status": "affected", "version": "7.6.2"}, {"status": "affected", "version": "7.7.10"}, {"status": "affected", "version": "7.6.2.1"}, {"status": "affected", "version": "7.7.10.1"}, {"status": "affected", "version": "7.4.2.4"}, {"status": "affected", "version": "7.2.10.2"}, {"status": "affected", "version": "7.4.3"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco UTD SNORT IPS Engine Software", "versions": [{"status": "affected", "version": "17.12.1a"}, {"status": "affected", "version": "17.12.2"}, {"status": "affected", "version": "17.13.1a"}, {"status": "affected", "version": "17.12.3"}, {"status": "affected", "version": "17.14.1a"}, {"status": "affected", "version": "17.12.4"}, {"status": "affected", "version": "17.12.3a"}, {"status": "affected", "version": "17.15.1a"}, {"status": "affected", "version": "17.16.1a"}, {"status": "affected", "version": "17.12.4a"}, {"status": "affected", "version": "17.15.2c"}, {"status": "affected", "version": "17.12.4b"}, {"status": "affected", "version": "17.15.2a"}, {"status": "affected", "version": "17.12.5"}, {"status": "affected", "version": "17.17.1"}, {"status": "affected", "version": "17.12.5a"}, {"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": "17.18.1"}, {"status": "affected", "version": "17.18.1a"}, {"status": "affected", "version": "17.12.6"}, {"status": "affected", "version": "17.15.4c"}, {"status": "affected", "version": "17.12.5d"}, {"status": "affected", "version": "17.18.2"}], "defaultStatus": "unknown"}]}], "published": "2026-03-04T18:16:20.320", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed", "source": "psirt@cisco.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-369"}]}], "descriptions": [{"lang": "en", "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. \r\n \r\nThis vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 a denial of service (DoS) condition."}, {"lang": "es", "value": "M\u00faltiples productos Cisco se ven afectados por una vulnerabilidad en la caracter\u00edstica de Visual Basic para Aplicaciones (VBA) de Snort 3 que podr\u00eda permitir a un atacante remoto no autenticado causar la ca\u00edda del motor de detecci\u00f3n de Snort 3.\n\nEsta vulnerabilidad se debe a la falta de una comprobaci\u00f3n de errores adecuada al descomprimir datos VBA. Un atacante podr\u00eda explotar esta vulnerabilidad enviando datos VBA manipulados al motor de detecci\u00f3n de Snort 3 en el dispositivo objetivo. Un exploit exitoso podr\u00eda permitir al atacante causar que el motor de detecci\u00f3n de Snort 3 se reinicie inesperadamente, provocando una condici\u00f3n de denegaci\u00f3n de servicio (DoS)."}], "lastModified": "2026-06-17T10:16:59.703", "sourceIdentifier": "psirt@cisco.com"}