Insecure DLL loading in Foxit PDF Editor (formerly Foxit PhantomPDF) and Foxit PDF Reader for Windows - CVE-2026-91803
Published: September 23, 2026
Vulnerability identifier: #VU151832
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-91803
CWE-ID: CWE-427
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to an uncontrolled search path element in the update process when performing high-privilege operations. A local user can place a dynamic-link library in a user-writable directory to escalate privileges.
Affected software
Foxit PDF Editor (formerly Foxit PhantomPDF)
Foxit PDF Reader for Windows
Foxit PDF Reader for Windows
How to mitigate CVE-2026-91803
Install security update from vendor's website.
Foxit PDF Editor (formerly Foxit PhantomPDF) - addressed in versions 13.2.7.24160, 14.0.8.33807, 2026.2.1.39815
Foxit PDF Reader for Windows - update to 2026.2.1.39815
Foxit PDF Reader for Windows - update to 2026.2.1.39815