cisco-sa-clamav-css-Fn4QSZ: ClamAV Cascading Style Sheets Image Parsing Error Handling Denial of Service Vulnerability

Published Mar 4, 2026
·
Updated

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

Affected Software

1 affected component
Cisco ClamAV

Event History

Mar 4, 2026
Advisory Published
via Cisco·04:00 PM
Data Sourced
via Cisco·04:00 PM
DescriptionSeverityWeakness

Child vulnerabilities

Contains the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of cisco-sa-clamav-css-Fn4QSZ?

The severity of cisco-sa-clamav-css-Fn4QSZ is categorized as medium with a score of 4.

2

How do I fix cisco-sa-clamav-css-Fn4QSZ?

To fix cisco-sa-clamav-css-Fn4QSZ, update Cisco ClamAV to the latest version provided by Cisco.

3

What type of vulnerability is cisco-sa-clamav-css-Fn4QSZ?

cisco-sa-clamav-css-Fn4QSZ is a denial of service (DoS) vulnerability related to improper error handling in the CSS module of ClamAV.

4

Who can exploit the cisco-sa-clamav-css-Fn4QSZ vulnerability?

An unauthenticated, remote attacker can exploit the cisco-sa-clamav-css-Fn4QSZ vulnerability to cause a DoS condition on an affected device.

5

What causes the cisco-sa-clamav-css-Fn4QSZ vulnerability?

The cisco-sa-clamav-css-Fn4QSZ vulnerability is caused by improper error handling when splitting UTF-8 strings in the ClamAV HTML CSS module.

Contact

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