ZDI-CAN-31135: ZDI-26-721: Foxit PDF Reader U3D File Parsing Integer Overflow Remote Code Execution Vulnerability
Published Sep 23, 2026
·Updated
This vulnerability allows remote 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 7.8. The following CVEs are assigned: CVE-2026-91789.
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 must an attacker do to exploit this issue?
The attacker must persuade the target to visit a malicious page or open a malicious file. Successful exploitation can result in arbitrary code execution on the affected Foxit PDF Reader installation.
2
Is this a remote code execution vulnerability?
Yes. The advisory describes remote attackers being able to execute arbitrary code, but exploitation requires user interaction.