CVE-2021-34962: 
Foxit PDF Reader vulnerability analysis and mitigation

CVE-2021-34962 is a Use-After-Free Remote Code Execution vulnerability affecting Foxit PDF Editor. The vulnerability was discovered in 2021 and disclosed on October 15th, 2021. This vulnerability affects installations of Foxit PDF Editor and requires user interaction to exploit, specifically requiring the target to visit a malicious page or open a malicious file (ZDI Advisory).

The vulnerability exists within the handling of Annotation objects, specifically Caret Annotations. The issue stems from the lack of validating the existence of an object prior to performing operations on the object. The vulnerability has been assigned a CVSS score of 7.8 (High) with the following vector: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (ZDI Advisory).

An attacker can leverage this vulnerability to execute arbitrary code in the context of the current process. The successful exploitation could lead to complete compromise of the affected system, with high impacts on confidentiality, integrity, and availability (ZDI Advisory).

Foxit has issued an update to correct this vulnerability. Users should update their Foxit PDF Editor to the latest version available through the official website or through the application's built-in update mechanism (ZDI Advisory).