CVE-2026-3780 Foxit PDF Editor/Reader Installer Uncontrolled Search Path Privilege Escalation
A local attacker can escalate privileges by placing malicious binaries in user-writable directories that the Foxit installer loads instead of legitimate system files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-3780?
CVE-2026-3780 is a high-severity vulnerability in Foxit Pdf Editor, published on 1 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
The application's installer runs with elevated privileges but resolves system executables and DLLs using untrusted search paths that can include user-writable directories, allowing a local attacker to place malicious binaries with the same names and have them loaded or executed instead of the legitimate system files, resulting in local privilege escalation.
Weakness: CWE-426
Which versions are affected by CVE-2026-3780?
It affects 2 products.
Products include Foxit Pdf Editor, Foxit Pdf Reader.
How do I fix CVE-2026-3780?
No fix has been published for CVE-2026-3780 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-3780 being exploited?
There is no known exploitation of CVE-2026-3780 in the wild and no public exploit code.
Other vulnerabilities in Foxit Pdf Editor
Sources
Also known as GHSA-jcq9-87h6-4wcr.