CVE-2026-91813

HIGH 8.8

Foxit PDF Editor/Reader FoxitUpdater Race Condition Local Privilege Escalation Vulnerability

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows an update package to be replaced between download and high-privilege extraction due to insufficient file locking and integrity validation. This could enable local attackers to execute arbitrary code with elevated privileges.

CWE	CWE-367
Vendor	foxit software inc.
Product	foxit pdf editor
Published	Sep 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Foxit Software Inc. / Foxit PDF Editor

Versions 2026.2 and earlier Versions 14.0.7 and earlier Versions 13.2.6 and earlier

Foxit Software Inc. / Foxit PDF Reader

Versions 2026.2 and earlier

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

praydog & kmx00 working with TrendAI Zero Day Initiative