CVE-2026-91812 PUBLISHED

Foxit PDF Editor/Reader FoxitUpdater Improper Certificate Validation Local Privilege Escalation Vulnerability

Assigner: Foxit
Reserved: 15.09.2026 Published: 23.09.2026 Updated: 23.09.2026

A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows man-in-the-middle attackers to bypass certificate validation and package integrity checks, potentially enabling arbitrary code execution with system privileges.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS Score: 7.9

Attack Vector	Adjacent Network	Scope	Changed
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	Required	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Foxit Software Inc.
Product	Foxit PDF Editor
Versions	Default: unaffected Version Versions 2026.2 and earlier is affected Version Versions 14.0.7 and earlier is affected Version Versions 13.2.6 and earlier is affected

Vendor	Foxit Software Inc.
Product	Foxit PDF Reader
Versions	Default: unaffected Version Versions 2026.2 and earlier is affected

Credits

praydog & kmx00 working with TrendAI Zero Day Initiative finder

References

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

Problem Types

CWE-295 Improper Certificate Validation CWE

Impacts

Local Privilege Escalation