ZDI-26-738: Foxit PDF Reader Annotation Use-After-Free Information Disclosure Vulnerability
Published Sep 23, 2026
·Updated
This vulnerability allows remote attackers to disclose sensitive information 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 3.3. The following CVEs are assigned: CVE-2026-91809.
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?
An attacker must persuade the target to visit a malicious page or open a malicious file. The issue is remotely exploitable but requires user interaction.
2
What is the potential impact?
Successful exploitation can disclose sensitive information from an affected Foxit PDF Reader installation. ZDI assigned the issue a CVSS score of 3.3.