FKIE_CVE-2026-20214
Vulnerability from fkie_nvd - Published: 2026-07-01 17:16 - Updated: 2026-10-25 17:10
Severity
Summary
A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device.
This vulnerability is due to improper boundary checks for content in FSG files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains portable executable content compressed with FSG 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
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| cisco | secure_endpoint | * | |
| cisco | secure_endpoint | * | |
| cisco | secure_endpoint | * | |
| clamav | clamav | * | |
| clamav | clamav | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "Cisco Secure Endpoint",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"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"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:*",
"matchCriteriaId": "E534D1FF-B590-40F3-9874-AC2BDA807087",
"versionEndExcluding": "1.27.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:*",
"matchCriteriaId": "CB2B4CBA-534A-4111-8920-8580B12C4F46",
"versionEndExcluding": "1.29.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*",
"matchCriteriaId": "4EB7F99A-01AB-44EE-B682-5E2C9E7D2A4B",
"versionEndExcluding": "8.6.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CD23E971-4735-4C28-BFE1-AB807630F2EE",
"versionEndExcluding": "1.4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*",
"matchCriteriaId": "5CC3C470-BBC6-449E-80F1-F9E762442D3C",
"versionEndExcluding": "1.5.3",
"versionStartIncluding": "1.5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device.\r\n\r\nThis vulnerability is due to improper boundary checks for content in FSG files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains portable executable content compressed with FSG 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 FSG de ClamAV podr\u00eda permitir a un atacante remoto no autenticado causar una condici\u00f3n de DoS, o posiblemente otros impactos expandidos, resultantes de corrupci\u00f3n de memoria en un dispositivo afectado.\n\nEsta vulnerabilidad se debe a comprobaciones de l\u00edmites inadecuadas para el contenido en archivos FSG durante el escaneo, 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 manipulado que contiene contenido ejecutable port\u00e1til comprimido con FSG 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-2026-20214",
"lastModified": "2026-10-25T17:10:00.197",
"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-2026-20214",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-01T17:18:19.481926Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-01T17:16:29.637",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-88cFYyxR"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-120"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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