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.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 15 Jan 2026 08:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft windows
Sumatrapdfreader
Sumatrapdfreader sumatrapdf
Vendors & Products Microsoft
Microsoft windows
Sumatrapdfreader
Sumatrapdfreader sumatrapdf

Wed, 14 Jan 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 14 Jan 2026 20:45:00 +0000

Type Values Removed Values Added
Description 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.
Title SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp
Weaknesses CWE-426
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-14T21:04:47.478Z

Reserved: 2026-01-13T18:22:43.979Z

Link: CVE-2026-23512

cve-icon Vulnrichment

Updated: 2026-01-14T21:04:38.719Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-14T21:15:54.013

Modified: 2026-01-16T15:55:33.063

Link: CVE-2026-23512

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-15T08:03:25Z

Weaknesses