CVE-2026-20031 MEDIUM

CVE-2026-20031: ClamAV CSS Image Parsing Error Handling Denial of Service Vulnerability

Vendor Cisco
Product Cisco Secure Endpoint
Weakness CWE-248
Published March 4, 2026
Last update March 5, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

What the vulnerability does

01Description

A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.

Key dates

02Disclosure timeline

March 4, 2026 CVE published
March 5, 2026 Record updated