CVE-2026-91795: Foxit PDF Editor/Reader FileOpen Uninitialized Variable Remote Code Execution Vulnerability
Foxit PDF Editor/Reader's FileOpen plugin did not adequately validate certain encryption metadata in specially crafted PDF files. This could leave an internal pointer in an invalid state, resulting in chained read and write access violations and potentially enabling arbitrary code execution.
Affected Software
Event History
Frequently Asked Questions
What user interaction is required for exploitation?
The attack vector is local and user interaction is required. A user would need to interact with a specially crafted PDF file for the vulnerable FileOpen plugin code path to be reached.
What access does an attacker need before attempting exploitation?
The vulnerability is rated with no privileges required. An attacker does not need an existing account or authenticated access, but must get a crafted PDF to a user and rely on that user interaction.
What is the potential impact if exploitation succeeds?
Successful exploitation could enable arbitrary code execution through chained read and write access violations. The severity vector indicates high potential impact to confidentiality, integrity, and availability.
How can organizations determine whether they are affected?
Review whether Foxit PDF Editor or Reader deployments have the FileOpen plugin enabled or installed. The provided information does not identify affected versions, fixed versions, or a detection indicator.