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Vulnerabilities CVE-2026-74801

CVE-2026-74801

High
Open
TLP:CLEAR

SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe

AI Analysis

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Description

SiYuan before 3.7.4 fails to properly escape workspace directory paths when constructing command-line arguments for the elevated elevator.exe helper process. Attackers can create a malicious workspace directory with command metacharacters in its path and trigger the Microsoft Defender exclusion flow to execute arbitrary commands with administrator privileges after UAC approval.

Details

CVSS Score
8.6
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Confidence
90%
Published
Aug 17, 2026
Last Modified
Aug 17, 2026
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