CVE-2021-34961: Foxit PDF Editor

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Foxit PDF Editor Ink Annotation Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of Annotation objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-14363.

Affected products

• Foxit PDF Editor: up to and including 10.1.5.37672; version 11.0.0.49893 only; version 11.0.1.49938 only
• Foxit PDF Reader: up to and including 11.0.1.49938

Published 2024-05-07. Last modified 2026-06-17.