sumatrapdfreader SumatraPDF up to 3.5.2 on Windows Binary explorer.exe untrusted search path

Summaryinfo

A vulnerability categorized as problematic has been discovered in sumatrapdfreader SumatraPDF up to 3.5.2 on Windows. The impacted element is an unknown function of the file explorer.exe of the component Binary Handler. The manipulation results in untrusted search path. This vulnerability is identified as CVE-2026-25880. The attack is only possible with local access. There is not any exploit available.

Detailsinfo

A vulnerability was found in sumatrapdfreader SumatraPDF up to 3.5.2 on Windows. It has been classified as critical. Affected is an unknown functionality of the file explorer.exe of the component Binary Handler. The manipulation with an unknown input leads to a untrusted search path vulnerability. CWE is classifying the issue as CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-25880 since 02/06/2026. The exploitability is told to be difficult. Local access is required to approach this attack. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/10/2026). This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• sumatrapdfreader

Name

• SumatraPDF

Version

• 3.5.0
• 3.5.1
• 3.5.2

Website

• Product: https://github.com/sumatrapdfreader/sumatrapdf/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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