CVE-2026-25880
High
Description
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, the PDF reader allows execution of a malicious binary (explorer.exe) located in the same directory as the opened PDF when the user clicks File → “Show in folder”. This behavior leads to arbitrary code execution on the victim’s system with the privileges of the current user, without any warning or user interaction beyond the menu click.
SeverityHigh
CVSS7.8
Exploit probability—
ProductSumatrapdf
PublishedFeb 9, 2026
First seenFeb 9, 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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