CVE-2021-34853

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. 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-14013.

• CWE-416
• CWE-416

• https://www.foxit.com/support/security-bulletins.htmlVendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-935/Third Party Advisory, VDB Entry
• https://www.foxit.com/support/security-bulletins.htmlVendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-21-935/Third Party Advisory, VDB Entry

Published

Aug 4, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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