CVE-2026-20345

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20345", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2025-10-08T11:59:15.413Z", "datePublished": "2026-08-07T16:42:46.329Z", "dateUpdated": "2026-08-07T21:02:19.379Z"}, "containers": {"cna": {"title": "ClamAV GPT File Format Processing Memory Corruption Vulnerability", "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}}], "descriptions": [{"lang": "en", "value": "A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.\r\n\r\nThis vulnerability is due to improper handling of an endian conversion operation, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted GPT file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software."}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26", "name": "cisco-sa-clamav-WuuvVd26"}], "exploits": [{"lang": "en", "value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerabilities that are described in CVE-2026-20337 and CVE-2026-20338.\r\n\r\nThe Cisco PSIRT is not aware of proof-of-concept exploit code for any of the other vulnerabilities that are described in this advisory.\r\nThe Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are described in this advisory."}], "source": {"advisory": "cisco-sa-clamav-WuuvVd26", "discovery": "EXTERNAL", "defects": ["CSCwv55000"]}, "problemTypes": [{"descriptions": [{"lang": "en", "description": "Stack-based Buffer Overflow", "type": "cwe", "cweId": "CWE-121"}]}], "affected": [{"vendor": "Cisco", "product": "Cisco Secure Endpoint", "versions": [{"version": "1.12.3", "status": "affected"}, {"version": "1.8.0", "status": "affected"}, {"version": "1.11.1", "status": "affected"}, {"version": "1.12.4", "status": "affected"}, {"version": "1.10.0", "status": "affected"}, {"version": "1.12.0", "status": "affected"}, {"version": "1.8.1", "status": "affected"}, {"version": "1.10.1", "status": "affected"}, {"version": "1.10.2", "status": "affected"}, {"version": "1.12.2", "status": "affected"}, {"version": "1.6.0", "status": "affected"}, {"version": "1.9.0", "status": "affected"}, {"version": "1.7.0", "status": "affected"}, {"version": "1.12.1", "status": "affected"}, {"version": "1.12.6", "status": "affected"}, {"version": "1.8.4", "status": "affected"}, {"version": "1.11.0", "status": "affected"}, {"version": "1.9.1", "status": "affected"}, {"version": "1.12.5", "status": "affected"}, {"version": "2.0.2", "status": "affected"}, {"version": "1.1.0", "status": "affected"}, {"version": "1.14.0", "status": "affected"}, {"version": "2.4.0", "status": "affected"}, {"version": "1.15.2", "status": "affected"}, {"version": "1.16.0", "status": "affected"}, {"version": "1.21.0", "status": "affected"}, {"version": "1.22.2", "status": "affected"}, {"version": "1.24.5", "status": "affected"}, {"version": "1.19.0", "status": "affected"}], "defaultStatus": "unknown"}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-08-07T16:42:46.329Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-07T20:59:19.768388Z", "id": "CVE-2026-20345", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-07T21:02:19.379Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "Cisco Secure Endpoint", "vendor": "Cisco", "versions": [{"status": "affected", "version": "1.12.3"}, {"status": "affected", "version": "1.8.0"}, {"status": "affected", "version": "1.11.1"}, {"status": "affected", "version": "1.12.4"}, {"status": "affected", "version": "1.10.0"}, {"status": "affected", "version": "1.12.0"}, {"status": "affected", "version": "1.8.1"}, {"status": "affected", "version": "1.10.1"}, {"status": "affected", "version": "1.10.2"}, {"status": "affected", "version": "1.12.2"}, {"status": "affected", "version": "1.6.0"}, {"status": "affected", "version": "1.9.0"}, {"status": "affected", "version": "1.7.0"}, {"status": "affected", "version": "1.12.1"}, {"status": "affected", "version": "1.12.6"}, {"status": "affected", "version": "1.8.4"}, {"status": "affected", "version": "1.11.0"}, {"status": "affected", "version": "1.9.1"}, {"status": "affected", "version": "1.12.5"}, {"status": "affected", "version": "2.0.2"}, {"status": "affected", "version": "1.1.0"}, {"status": "affected", "version": "1.14.0"}, {"status": "affected", "version": "2.4.0"}, {"status": "affected", "version": "1.15.2"}, {"status": "affected", "version": "1.16.0"}, {"status": "affected", "version": "1.21.0"}, {"status": "affected", "version": "1.22.2"}, {"status": "affected", "version": "1.24.5"}, {"status": "affected", "version": "1.19.0"}]}], "source": "psirt@cisco.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device.\r\n\r\nThis vulnerability is due to improper handling of an endian conversion operation, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted GPT file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software."}, {"lang": "es", "value": "Una vulnerabilidad en el analizador de formato de archivo GPT de ClamAV podr\u00eda permitir a un atacante remoto no autenticado causar una condici\u00f3n de DoS o posiblemente otros impactos expandidos como resultado de corrupci\u00f3n de memoria en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a un manejo inadecuado de una operaci\u00f3n de conversi\u00f3n endian, lo que puede resultar en una escritura de b\u00fafer fuera de l\u00edmites. Un atacante podr\u00eda explotar esta vulnerabilidad al enviar un archivo GPT manipulado para ser escaneado por ClamAV en un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante causar la terminaci\u00f3n del proceso de escaneo de ClamAV, lo que resultar\u00eda en una condici\u00f3n de DoS en el software afectado."}], "id": "CVE-2026-20345", "lastModified": "2026-10-23T20:10:00.160", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "psirt@cisco.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20345", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-07T20:59:19.768388Z", "version": "2.0.3"}}]}, "published": "2026-08-07T17:17:03.003", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

{}

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