CVE-2026-20339
Full vulnerability record from the local CVENow database.
Description
A vulnerability in the PESpin 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. This vulnerability is due to improper boundary checks for content in PESpin files during scanning, which may result in an integer overflow. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin content 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.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-08-07 17:17:02.807000
Last modified
2026-10-23 20:10:00.160000
View original CVE JSON
{
"id": "CVE-2026-20339",
"sourceIdentifier": "[email protected]",
"published": "2026-08-07T17:17:02.807",
"lastModified": "2026-10-23T20:10:00.160",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the PESpin 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 boundary checks for content in PESpin files during scanning, which may result in an integer overflow. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin content 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 PESpin de ClamAV podría permitir a un atacante remoto no autenticado causar una condición de DoS o posiblemente otros impactos expandidos como resultado de corrupción de memoria en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a comprobaciones de límites inadecuadas para el contenido en archivos PESpin durante el escaneo, lo que puede resultar en un desbordamiento de entero. Un atacante podría explotar esta vulnerabilidad al enviar un archivo manipulado que contiene contenido PESpin para ser escaneado por ClamAV en un dispositivo afectado. Un exploit exitoso podría permitir al atacante causar la terminación del proceso de escaneo de ClamAV, lo que resultaría en una condición de DoS en el software afectado."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco Secure Endpoint",
"defaultStatus": "unknown",
"versions": [
{
"version": "7.0.5",
"status": "affected"
},
{
"version": "6.2.19",
"status": "affected"
},
{
"version": "7.3.3",
"status": "affected"
},
{
"version": "7.2.13",
"status": "affected"
},
{
"version": "6.1.5",
"status": "affected"
},
{
"version": "6.3.1",
"status": "affected"
},
{
"version": "6.2.5",
"status": "affected"
},
{
"version": "7.3.5",
"status": "affected"
},
{
"version": "6.2.1",
"status": "affected"
},
{
"version": "7.2.7",
"status": "affected"
},
{
"version": "7.1.1",
"status": "affected"
},
{
"version": "6.3.5",
"status": "affected"
},
{
"version": "6.2.9",
"status": "affected"
},
{
"version": "7.3.1",
"status": "affected"
},
{
"version": "6.1.7",
"status": "affected"
},
{
"version": "7.2.11",
"status": "affected"
},
{
"version": "7.2.3",
"status": "affected"
},
{
"version": "7.1.5",
"status": "affected"
},
{
"version": "6.3.3",
"status": "affected"
},
{
"version": "7.3.9",
"status": "affected"
},
{
"version": "6.2.3",
"status": "affected"
},
{
"version": "6.1.9",
"status": "affected"
},
{
"version": "6.0.9",
"status": "affected"
},
{
"version": "7.2.5",
"status": "affected"
},
{
"version": "6.0.7",
"status": "affected"
},
{
"version": "6.3.7",
"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": "1.12.1",
"status": "affected"
},
{
"version": "1.12.6",
"status": "affected"
},
{
"version": "1.14.0",
"status": "affected"
},
{
"version": "1.10.2",
"status": "affected"
},
{
"version": "1.12.7",
"status": "affected"
},
{
"version": "1.12.2",
"status": "affected"
},
{
"version": "1.6.0",
"status": "affected"
},
{
"version": "1.9.0",
"status": "affected"
},
{
"version": "1.11.0",
"status": "affected"
},
{
"version": "1.7.0",
"status": "affected"
},
{
"version": "1.13.0",
"status": "affected"
},
{
"version": "1.8.4",
"status": "affected"
},
{
"version": "1.13.1",
"status": "affected"
},
{
"version": "1.9.1",
"status": "affected"
},
{
"version": "1.12.5",
"status": "affected"
},
{
"version": "1.13.2",
"status": "affected"
},
{
"version": "8.1.7.21512",
"status": "affected"
},
{
"version": "8.1.7",
"status": "affected"
},
{
"version": "8.1.5",
"status": "affected"
},
{
"version": "8.1.3.21242",
"status": "affected"
},
{
"version": "8.1.3",
"status": "affected"
},
{
"version": "8.1.5.21322",
"status": "affected"
},
{
"version": "8.1.7.21417",
"status": "affected"
},
{
"version": "1.14.1",
"status": "affected"
},
{
"version": "1.15.1",
"status": "affected"
},
{
"version": "1.15.2",
"status": "affected"
},
{
"version": "1.15.3",
"status": "affected"
},
{
"version": "1.15.4",
"status": "affected"
},
{
"version": "1.15.5",
"status": "affected"
},
{
"version": "1.15.6",
"status": "affected"
},
{
"version": "1.16.0",
"status": "affected"
},
{
"version": "1.16.1",
"status": "affected"
},
{
"version": "1.16.2",
"status": "affected"
},
{
"version": "1.16.3",
"status": "affected"
},
{
"version": "1.18.0",
"status": "affected"
},
{
"version": "1.18.1",
"status": "affected"
},
{
"version": "1.20.0",
"status": "affected"
},
{
"version": "1.21.0",
"status": "affected"
},
{
"version": "1.21.1",
"status": "affected"
},
{
"version": "1.21.2",
"status": "affected"
},
{
"version": "1.21.3",
"status": "affected"
},
{
"version": "1.22.0",
"status": "affected"
},
{
"version": "1.22.1",
"status": "affected"
},
{
"version": "1.22.2",
"status": "affected"
},
{
"version": "1.22.3",
"status": "affected"
},
{
"version": "1.22.4",
"status": "affected"
},
{
"version": "1.24.0",
"status": "affected"
},
{
"version": "1.24.1",
"status": "affected"
},
{
"version": "1.24.2",
"status": "affected"
},
{
"version": "1.24.3",
"status": "affected"
},
{
"version": "1.24.4",
"status": "affected"
},
{
"version": "1.26.0",
"status": "affected"
},
{
"version": "1.24.5",
"status": "affected"
},
{
"version": "1.26.1",
"status": "affected"
},
{
"version": "1.27.0",
"status": "affected"
},
{
"version": "1.15.0",
"status": "affected"
},
{
"version": "1.17.0",
"status": "affected"
},
{
"version": "1.17.1",
"status": "affected"
},
{
"version": "1.17.2",
"status": "affected"
},
{
"version": "1.19.0",
"status": "affected"
},
{
"version": "1.20.1",
"status": "affected"
},
{
"version": "1.20.2",
"status": "affected"
},
{
"version": "1.20.3",
"status": "affected"
},
{
"version": "1.20.4",
"status": "affected"
},
{
"version": "1.20.5",
"status": "affected"
},
{
"version": "1.20.6",
"status": "affected"
},
{
"version": "1.23.0",
"status": "affected"
},
{
"version": "1.23.1",
"status": "affected"
},
{
"version": "1.20.7",
"status": "affected"
},
{
"version": "1.20.8",
"status": "affected"
},
{
"version": "1.25.0",
"status": "affected"
},
{
"version": "1.25.1",
"status": "affected"
},
{
"version": "1.25.2",
"status": "affected"
},
{
"version": "1.27.1",
"status": "affected"
},
{
"version": "1.27.2",
"status": "affected"
},
{
"version": "7.3.13",
"status": "affected"
},
{
"version": "7.3.15",
"status": "affected"
},
{
"version": "7.4.1",
"status": "affected"
},
{
"version": "7.4.1.20425",
"status": "affected"
},
{
"version": "7.4.1.20439",
"status": "affected"
},
{
"version": "7.4.3",
"status": "affected"
},
{
"version": "7.4.3.20679",
"status": "affected"
},
{
"version": "7.4.5",
"status": "affected"
},
{
"version": "7.5.1.20813",
"status": "affected"
},
{
"version": "7.5.1.20833",
"status": "affected"
},
{
"version": "7.5.3",
"status": "affected"
},
{
"version": "7.5.5",
"status": "affected"
},
{
"version": "8.0.1.21160",
"status": "affected"
},
{
"version": "8.0.1.21164",
"status": "affected"
},
{
"version": "7.5.7",
"status": "affected"
},
{
"version": "7.5.9",
"status": "affected"
},
{
"version": "7.5.11",
"status": "affected"
},
{
"version": "8.1.7.21585",
"status": "affected"
},
{
"version": "7.5.13.21586",
"status": "affected"
},
{
"version": "7.5.13.21598",
"status": "affected"
},
{
"version": "8.2.1.21612",
"status": "affected"
},
{
"version": "8.2.1.21650",
"status": "affected"
},
{
"version": "7.5.15.21611",
"status": "affected"
},
{
"version": "7.5.17.21680",
"status": "affected"
},
{
"version": "8.2.3.30119",
"status": "affected"
},
{
"version": "8.2.4.30130",
"status": "affected"
},
{
"version": "8.4.0",
"status": "affected"
},
{
"version": "7.5.19",
"status": "affected"
},
{
"version": "8.4.1.30298",
"status": "affected"
},
{
"version": "8.4.2.30317",
"status": "affected"
},
{
"version": "8.4.1.30307",
"status": "affected"
},
{
"version": "7.5.20",
"status": "affected"
},
{
"version": "8.4.3",
"status": "affected"
},
{
"version": "8.4.4.30419",
"status": "affected"
},
{
"version": "8.4.4.30467",
"status": "affected"
},
{
"version": "7.5.21.21732",
"status": "affected"
},
{
"version": "8.4.5.30483",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"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"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-08-07T20:59:43.966111Z",
"id": "CVE-2026-20339",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-190"
}
]
}
],
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26",
"source": "[email protected]"
}
]
}