Windows
CVE-2026-23512
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:R/S:C/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:C/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionGitHub Advisory
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, there is a Untrusted Search Path vulnerability when Advanced Options setting is trigger. The application executes notepad.exe without specifying an absolute path when using the Advanced Options setting. On Windows, this allows execution of a malicious notepad.exe placed in the application's installation directory, leading to arbitrary code execution.
AnalysisAI
SumatraPDF 3.5.2 and earlier on Windows contains an untrusted search path vulnerability in the Advanced Options feature that allows arbitrary code execution through a malicious notepad.exe placed in the application directory. An attacker with local access can exploit this when a user triggers the Advanced Options setting, as the application fails to specify an absolute path when launching notepad.exe. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | SumatraPDF version 3.5.2 or earlier with Advanced Options setting accessible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.6 (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. |
| Remediation | A vendor patch is available — apply it immediately. Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 7 days: Identify all affected systems and apply vendor patches promptly. …
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External POC / Exploit Code
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