CVE-2026-23512
High
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.
SeverityHigh
CVSS8.6
Exploit probability—
ProductSumatrapdf
PublishedJan 14, 2026
First seenJan 14, 2026
Weakness typeCWE-426CWE-426
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sumatrapdfreader sumatrapdf | v ≤ 3.5.2 | — |
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