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Tool Directory

CVE-2026-3780

HighPublished

Foxit PDF Editor/Reader Installer Uncontrolled Search Path Privilege Escalation

Published: Apr 1, 2026
Updated: Apr 2, 2026
Assigning CNA: Foxit
Evidence observed: Aug 6, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS probability estimate

0.1%

Low · next 30 days

Percentile: 2.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-57239PoC
Proof of concept exploit for CVE-2026-3775/CVE-2026-3780 and CVE-2026-57239 which lets you obtain NT AUTHORITY\SYSTEM rights via the Foxit PDF Reader updater service.

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