ZDI-26-744: Foxit PDF Reader AcroForm Use-After-Free Remote Code Execution Vulnerability
ZDI disclosed a Foxit PDF Reader AcroForm use-after-free enabling remote code execution via a malicious file.
The Zero Day Initiative published ZDI-26-744, a use-after-free in Foxit PDF Reader's AcroForm handling tracked as CVE-2026-91816. ZDI assigned CVSS 7.8 and says a remote attacker can execute arbitrary code if a user opens a malicious file or visits a malicious page. The advisory does not state that exploitation has been observed.
- CVE-2026-91816 is an AcroForm use-after-free in Foxit PDF Reader.
- ZDI rates it CVSS 7.8 and says it can lead to remote code execution.
- Exploitation requires the user to open a malicious file or visit a malicious page.
- The advisory does not report observed in-the-wild exploitation.
- CVEs
- CVE-2026-91816
- Vendors
- Foxit
- Products
- Foxit PDF Reader
- Organizations
- Zero Day Initiative
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-91816 | Use-after-free in Foxit PDF Editor/Reader with Reentrant Annotation Deletion Triggered by Embedded 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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