CVE-2021-34969

Foxit PDF Reader Annotation Use-After-Free Information Disclosure Vulnerability. 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 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 in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-14622.

• CWE-416

• https://www.foxit.com/support/security-bulletins.htmlVendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-1200/Third Party Advisory
• https://www.foxit.com/support/security-bulletins.htmlVendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-1200/Third Party Advisory

Published

May 7, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-34963Foxit PDF Editor PolyLine Annotation Use-After-Free Remote C…7.8
• CVE-2021-34964Foxit PDF Editor Polygon Annotation Use-After-Free Remote Co…7.8
• CVE-2021-34965Foxit PDF Editor Squiggly Annotation Use-After-Free Remote C…7.8
• CVE-2021-34966Foxit PDF Editor FileAttachment Annotation Use-After-Free Re…7.8
• CVE-2021-34967Foxit PDF Editor Line Annotation Use-After-Free Remote Code …7.8
• CVE-2021-34968Foxit PDF Editor transitionToState Use-After-Free Remote Cod…7.8
• CVE-2021-3497GStreamer before 1.18.4 might access already-freed memory in…7.8
• CVE-2021-34970Foxit PDF Reader print Method Use of Externally-Controlled F…5.5
• CVE-2021-34971Foxit PDF Reader JPG2000 File Parsing Heap-based Buffer Over…7.8
• CVE-2021-34972Foxit PDF Reader AcroForm Use-After-Free Information Disclos…5.5
• CVE-2021-34973Foxit PDF Reader PDF File Parsing Use-After-Free Information…5.5
• CVE-2021-34974Foxit PDF Reader Annotation Use-After-Free Remote Code Execu…7.8