ZDI-26-742: Foxit PDF Reader FoxitUpdater Race Condition Local Privilege Escalation Vulnerability
Published Sep 23, 2026
·Updated
This vulnerability allows local attackers to escalate privileges on affected installations of Foxit PDF Reader. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-91813.
Affected Software
1 affected component
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 level of access does an attacker need before exploiting this issue?
The attacker must already be able to execute low-privileged code on the target system. This is a local privilege-escalation issue, not an initial-access vulnerability.
2
What is the potential impact after successful exploitation?
A successful attacker can escalate privileges on an affected Foxit PDF Reader installation.