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.

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History

Mon, 17 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 17 Aug 2026 11:15:00 +0000

Type Values Removed Values Added
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.
Title SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe
First Time appeared B3log
B3log siyuan
Weaknesses CWE-78
CPEs cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
Vendors & Products B3log
B3log siyuan
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-17T15:16:34.015Z

Reserved: 2026-08-16T12:59:42.223Z

Link: CVE-2026-74801

cve-icon Vulnrichment

Updated: 2026-08-17T15:16:30.292Z

cve-icon NVD

Status : Received

Published: 2026-08-17T11:16:40.323

Modified: 2026-08-17T16:17:49.183

Link: CVE-2026-74801

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T12:45:03Z

Weaknesses