CVE-2026-20053

Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to improper range checking when decompressing VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause an overflow of heap data, which could cause 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 están afectados por una vulnerabilidad en la característica VBA de Snort 3 que podría permitir a un atacante remoto no autenticado provocar la caída del motor de detección de Snort 3. Esta vulnerabilidad se debe a una comprobación de rango incorrecta al descomprimir datos VBA, que son controlados por el usuario. 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 provocar un desbordamiento de datos en el heap, lo que podría causar 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-2026-20053

Mitre link : CVE-2026-20053

CVE.ORG link : CVE-2026-20053

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

{"id": "CVE-2026-20053", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20053", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-04T21:24:52.682489Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "psirt@cisco.com", "affectedData": [{"vendor": "Cisco", "product": "Cisco Cyber Vision", "versions": [{"status": "affected", "version": "3.0.0"}, {"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", "version": "4.1.4"}, {"status": "affected", "version": "4.2.0"}, {"status": "affected", "version": "4.2.1"}, {"status": "affected", "version": "4.1.5"}, {"status": "affected", "version": "4.2.2"}, {"status": "affected", "version": "4.2.X"}, {"status": "affected", "version": "4.2.3"}, {"status": "affected", "version": "4.2.4"}, {"status": "affected", "version": "4.2.6"}, {"status": "affected", "version": "4.1.6"}, {"status": "affected", "version": "4.3.0"}, {"status": "affected", "version": "4.3.1"}, {"status": "affected", "version": "4.3.2"}, {"status": "affected", "version": "4.3.3"}, {"status": "affected", "version": "4.4.0"}, {"status": "affected", "version": "4.4.1"}, {"status": "affected", "version": "4.4.2"}, {"status": "affected", "version": "4.4.3"}, {"status": "affected", "version": "4.1.7"}, {"status": "affected", "version": "5.0.0"}, {"status": "affected", "version": "5.0.1"}, {"status": "affected", "version": "5.0.2"}, {"status": "affected", "version": "5.1.0"}, {"status": "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"}, {"status": "affected", "version": "5.3.2"}], "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": "17.9.4"}, {"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": "17.9.5e"}, {"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": "2026-03-04T18:16:19.607", "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-122"}]}], "descriptions": [{"lang": "en", "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.\r\n\r\nThis vulnerability is due to improper range checking when decompressing VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause an overflow of heap data, which could cause a DoS condition."}, {"lang": "es", "value": "M\u00faltiples productos Cisco est\u00e1n afectados por una vulnerabilidad en la caracter\u00edstica VBA de Snort 3 que podr\u00eda permitir a un atacante remoto no autenticado provocar la ca\u00edda del motor de detecci\u00f3n de Snort 3.\n\nEsta vulnerabilidad se debe a una comprobaci\u00f3n de rango incorrecta al descomprimir datos VBA, que son controlados por el usuario. 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 provocar un desbordamiento de datos en el heap, lo que podr\u00eda causar una condici\u00f3n de DoS."}], "lastModified": "2026-06-17T10:16:59.160", "sourceIdentifier": "psirt@cisco.com"}