{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20053", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.355Z", "datePublished": "2026-03-04T17:46:58.213Z", "dateUpdated": "2026-03-04T21:25:01.489Z"}, "containers": {"cna": {"title": "Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Heap Overflow Denial of Service Vulnerability", "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L", "baseScore": 5.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}}], "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."}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed", "name": "cisco-sa-ftd-snort3-vbavuls-96UcVVed"}], "exploits": [{"lang": "en", "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}], "source": {"advisory": "cisco-sa-ftd-snort3-vbavuls-96UcVVed", "discovery": "INTERNAL", "defects": ["CSCwq23373"]}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "Heap-based Buffer Overflow", "type": "cwe", "cweId": "CWE-122"}]}], "affected": [{"vendor": "Cisco", "product": "Cisco Cyber Vision", "versions": [{"version": "3.0.0", "status": "affected"}, {"version": "3.0.2", "status": "affected"}, {"version": "3.0.3", "status": "affected"}, {"version": "3.0.1", "status": "affected"}, 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"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", "status": 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{"cveTags": [], "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."}], "id": "CVE-2026-20053", "lastModified": "2026-03-04T18:16:19.607", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "psirt@cisco.com", "type": "Primary"}]}, "published": "2026-03-04T18:16:19.607", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3-vbavuls-96UcVVed"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "psirt@cisco.com", "type": "Primary"}]}

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