CVE-2026-25880
Arbitrary Code Execution in SumatraPDF via Malicious Explorer.exe
Publication date: 2026-02-09
Last updated on: 2026-02-23
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| sumatrapdfreader | sumatrapdf | to 3.5.2 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in SumatraPDF version 3.5.2 and earlier. When a user opens a PDF file and then clicks File → “Show in folder”, the application executes a binary named explorer.exe if it is located in the same directory as the opened PDF. This can lead to arbitrary code execution on the victim's system with the privileges of the current user, without any warning or additional user interaction beyond the menu click.
How can this vulnerability impact me? :
The vulnerability can allow an attacker to execute arbitrary code on your system with the same privileges as the current user. This means that if exploited, malicious software could run without your knowledge or consent, potentially leading to data theft, system compromise, or further malware installation.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know