CVE Feed

    Dashboard / CVE / CVE-2026-20031

    CVE-2026-20031

    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.

    Published:Mar 4, 2026
    Last Modified:Apr 17, 2026
    EPS:Mar 4, 2026
    EPSS Score:0.00134
    CVSS Score:5.3

    Affected Products

    Vendor
    Cisco
    Product
    Secure Endpoint

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-248 Uncaught Exception

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-20348 (CVSS 7.5) — A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cau…
    CVE-2026-20345 (CVSS 7.5) — A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cau…
    CVE-2026-20339 (CVSS 7.5) — A vulnerability in the PESpin file format parser of ClamAV could allow an unauthenticated, remote attacker to …
    CVE-2026-20347 (CVSS 7.5) — A vulnerability in the Mach-O file format parser of ClamAV could allow an unauthenticated, remote attacker to …
    CVE-2026-20346 (CVSS 7.5) — A vulnerability in the PDF file format parser of ClamAV could allow an unauthenticated, remote attacker to cau…
    CVE-2026-20338 (CVSS 7.5) — A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a…
    CVE-2026-20337 (CVSS 7.5) — A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a…
    CVE-2026-20243 (CVSS 7.5) — A vulnerability in the ALZ file format parser of ClamAV could allow an unauthenticated, remote attacker to cau…
    CVE-2026-20244 (CVSS 7.5) — A vulnerability in the DMG file format parser of ClamAV could allow an unauthenticated, remote attacker to cau…
    CVE-2026-20213 (CVSS 7.5) — A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to caus…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High