ZDI-CAN-32452: ZDI-26-741: Foxit PDF Reader FoxitUpdater Improper Certificate Validation Local Privilege Escalation Vulnerability
Published Sep 23, 2026
·Updated
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.1. The following CVEs are assigned: CVE-2026-91812.
Affected Software
1 affected component
Foxit Foxit PDF Reader
Event History
Sep 23, 2026
Advisory Published
via ZDI·05:00 AM
Data Sourced
via ZDI·05:00 AM
Description
Frequently Asked Questions
1
What does an attacker need to do to exploit this issue?
The attacker must be network-adjacent and must induce the target to visit a malicious page or open a malicious file. Successful exploitation can result in arbitrary code execution on the affected installation.
2
How severe is this vulnerability?
ZDI assigned this issue a CVSS rating of 7.1, and the supplied risk value is 55. It is tracked as CVE-2026-91812.