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Vulnerability · Published Aug 7, 2026 · Assigned by cisco

CVE-2026-20346ClamAV PDF File Format Processing Memory Corruption Vulnerability

High 7.5

In plain English

A high-severity out-of-bounds read in Cisco Secure Endpoint from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 54.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A vulnerability in the PDF 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 PDF files during scanning, which may result in an out-of-bounds buffer read. An attacker could exploit this vulnerability by submitting a crafted PDF 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.24clamav1.4.6-r0ALPINE-CVE-2026-20346
Debian:12clamav1.4.6+dfsg-0+deb12u1DEBIAN-CVE-2026-20346
Debian:13clamavno fix listedDEBIAN-CVE-2026-20346
Debian:14clamav1.4.6+dfsg-1DEBIAN-CVE-2026-20346
Ubuntu:22.04:LTSclamav1.5.4+dfsg-0ubuntu0.22.04.1USN-8788-1
Ubuntu:22.04:LTSclamav1.5.4+dfsg-0ubuntu0.22.04.1UBUNTU-CVE-2026-20346
Ubuntu:24.04:LTSclamav1.5.4+dfsg-0ubuntu0.24.04.1USN-8788-1
Ubuntu:24.04:LTSclamav1.5.4+dfsg-0ubuntu0.24.04.1UBUNTU-CVE-2026-20346
Ubuntu:26.04:LTSclamav1.5.4+dfsg-0ubuntu0.26.04.1UBUNTU-CVE-2026-20346
Ubuntu:26.04:LTSclamav1.5.4+dfsg-0ubuntu0.26.04.1USN-8788-1

Affected products (as reported)

VendorProductVersions
Cisco Cisco Secure Endpoint 7.0.56.2.197.3.37.2.136.1.56.3.16.2.57.3.5

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References