ZDI-26-595: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code 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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-57254.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Because user interaction is required to exploit this issue (victim must visit a malicious page or open a malicious file), restrict or warn users about opening unknown PDFs/links and block access to untrusted content at the network/email gateway where possible.
- Compensating control
Mitigate exposure to remote code execution by restricting access to Foxit PDF Reader execution on untrusted endpoints/users until the vendor fix is applied.
Event History
Frequently Asked Questions
What does an attacker need to do to exploit this issue?
The attacker must cause the target to visit a malicious page or open a malicious file. Successful exploitation can result in arbitrary code execution on the affected Foxit PDF Reader installation.
How severe is this vulnerability?
ZDI assigned this issue a CVSS score of 7.8, and the reported risk score is 81. Exploitation requires user interaction.