Local Privilege Escalation Vulnerability in Foxit PDF Editor/Reader
CVE-2026-91803

8.8HIGH

Key Information:

Vendor

Foxit Inc.

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

What is CVE-2026-91803?

A local privilege escalation vulnerability exists in the updater of Foxit PDF Editor/Reader due to the unsafe loading of dynamic-link libraries from user-writable directories. This flaw can be exploited by a local attacker to execute arbitrary code with elevated privileges during high-privilege operations, posing a significant risk to systems utilizing the affected software.

Affected Version(s)

Foxit PDF Editor Windows Versions 2026.2 and earlier

Foxit PDF Editor Windows Versions 14.0.7 and earlier

Foxit PDF Reader Windows Versions 2026.2 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

Du Yuze
.