Windows
CVE-2026-25880
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
SumatraPDF 3.5.2 and earlier on Windows allows arbitrary code execution when a user opens a PDF and selects "Show in folder," as the application executes a malicious explorer.exe binary from the same directory without warning. Public exploit code exists for this vulnerability, which affects any user who opens untrusted PDFs and interacts with the file menu option. An attacker can achieve code execution with the privileges of the victim's user account through a simple social engineering attack.
Technical ContextAI
Classified as CWE-426 (Untrusted Search Path). Affects Sumatrapdf. 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.
RemediationAI
Monitor vendor advisories for a patch.
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External POC / Exploit Code
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