CVE-2026-20348

A vulnerability in the XAR 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 XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR 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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cisco:secure_endpoint::::::macos::*
	cpe:2.3:a:cisco:secure_endpoint::::::linux::*
	cpe:2.3:a:cisco:secure_endpoint::::::windows::*
	cpe:2.3:a:cisco:secure_endpoint::::::windows::*

History

No history.

Information

Published : 2026-08-07 17:17

Updated : 2026-08-19 20:17

NVD link : CVE-2026-20348

Mitre link : CVE-2026-20348

CVE.ORG link : CVE-2026-20348

JSON object : View

Products Affected

cisco

secure_endpoint

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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{"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"}], "defaultStatus": "unknown"}]}], "published": "2026-08-07T17:17:03.537", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-120"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the XAR 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 XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR 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."}], "lastModified": "2026-08-19T20:17:55.527", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:*", "vulnerable": true, "matchCriteriaId": "AE09E68D-8D79-45EE-9161-62B822FA9403", "versionEndExcluding": "1.27.4"}, {"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:*", "vulnerable": true, "matchCriteriaId": "4DEAF10F-CB43-4C27-A062-9909E227B493", "versionEndExcluding": "1.29.2"}, {"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*", "vulnerable": true, "matchCriteriaId": "5AB509DB-FEE5-441D-9CB9-D64CC861982E", "versionEndExcluding": "7.5.24.21780"}, {"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*", "vulnerable": true, "matchCriteriaId": "5C85DDC8-D691-4E69-9232-887D041C2567", "versionEndExcluding": "8.6.3", "versionStartIncluding": "8.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}