CVE-2026-23512 HIGH

CVE-2026-23512: SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp

Vendor Sumatrapdfreader
Product sumatrapdf
Weakness CWE-426
Published January 14, 2026
Last update January 14, 2026
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, there is a Untrusted Search Path vulnerability when Advanced Options setting is trigger. The application executes notepad.exe without specifying an absolute path when using the Advanced Options setting. On Windows, this allows execution of a malicious notepad.exe placed in the application's installation directory, leading to arbitrary code execution.

Key dates

02Disclosure timeline

January 14, 2026 CVE published
January 14, 2026 Record updated