CVE-2026-20244
Severity CVSS v4.0:
Pending analysis
Type:
CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
01/07/2026
Last modified:
09/07/2026
Description
A vulnerability in the DMG 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.<br />
<br />
This vulnerability is due to improper boundary checks for content in DMG files during scanning, which may result in an integer overflow on 32-bit platforms only. An attacker could exploit this vulnerability by submitting a crafted file that contains DMG 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.
Impact
Base Score 3.x
7.50
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:* | 1.27.2 (excluding) | |
| cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:* | 1.29.0 (excluding) | |
| cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:* | 8.6.2 (excluding) | |
| cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* | 0.98.1 (including) | 1.4.5 (excluding) |
| cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* | 1.5.0 (including) | 1.5.3 (excluding) |
To consult the complete list of CPE names with products and versions, see this page