Update Mechanism Vulnerability in Foxit PDF Editor/Reader
CVE-2026-91813

8.8HIGH

Key Information:

Vendor

Foxit Inc.

Status
Foxit PDF Editor
Foxit
Vendor
CVE Published:
23 September 2026

What is CVE-2026-91813?

A vulnerability in the update mechanism of Foxit PDF Editor and Reader allows an attacker with local access to replace an update package during the download and extraction process. This occurs due to inadequate file locking and integrity validation, potentially enabling the attacker to execute arbitrary code with elevated privileges, thereby compromising the user's system.

Affected Version(s)

Foxit PDF Editor Windows Versions 2026.2 and earlier

Foxit PDF Editor Windows Versions 14.0.7 and earlier

Foxit PDF Editor Windows Versions 13.2.6 and earlier

References

https://www.foxit.com/support/security-bulletins.html

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

praydog & kmx00 working with TrendAI Zero Day Initiative
.