ZDI-26-722: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability
ZDI disclosed a Foxit PDF Reader annotation use-after-free enabling remote code execution after user interaction (CVE-2026-91791).
Trend Micro's Zero Day Initiative published ZDI-26-722, a use-after-free in Foxit PDF Reader's annotation handling that can allow remote code execution. Exploitation requires the user to open a malicious file or visit a malicious page. ZDI assigned CVSS 7.8 and CVE-2026-91791. The advisory does not report observed exploitation.
- Annotation use-after-free can lead to remote code execution.
- Victim must open a malicious file or visit a malicious page.
- ZDI rates the issue CVSS 7.8; CVE-2026-91791 is assigned.
- No in-the-wild exploitation is stated in the advisory.
- CVEs
- CVE-2026-91791
- Vendors
- Foxit
- Products
- Foxit PDF Reader
- Organizations
- Zero Day Initiative
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-91791 | Use-After-Free in Foxit PDF Editor/Reader via Crafted PDF JavaScript | 7.8 | — |
From the original article
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.
zerodayinitiative.com
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