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. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | SumatraPDF versions 3.5.2 and earlier with malicious explorer.exe file placed in the same local directory as the target PDF file. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this flaw, arbitrary code execution on the victim’s system with the pri. |
| Remediation | Monitor vendor advisories for a patch. Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Issue security alert to all users prohibiting use of SumatraPDF's 'Show in folder' feature and advise against opening PDFs from untrusted sources. …
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External POC / Exploit Code
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