CVE-2026-91803 Security Vulnerability Report – Foxit PDF Editor/Reader Updater DLL Search Path Hijacking
A local attacker can execute code with elevated privileges by exploiting unsafe DLL loading in the Foxit PDF updater.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91803?
CVE-2026-91803 is a high-severity vulnerability in Foxit Pdf Editor, published on 23 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A local privilege escalation vulnerability exists in the updater of Foxit PDF Editor/Reader due to unsafe loading of dynamic-link libraries from a user-writable directory during high-privilege operations. A local attacker could exploit this issue to execute code with elevated privileges.
Weakness: CWE-427
Which versions are affected by CVE-2026-91803?
It affects 2 products.
Products include Foxit Pdf Editor, Foxit Pdf Reader.
How do I fix CVE-2026-91803?
No fix has been published for CVE-2026-91803 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-91803 being exploited?
There is no known exploitation of CVE-2026-91803 in the wild and no public exploit code.
Other vulnerabilities in Foxit Pdf Editor
Sources
Also known as GHSA-hh85-f5h8-q4pf.