CVE-2026-74801
SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe
- State
- Published
- Severity
- 8.6 High
- Published
- Aug 17, 2026
- Updated
- Aug 17, 2026
- Reserved
- Aug 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | 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 | VulnCheck |
| 3.1 | 8.2 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-vmp7-pm7g-ghcc)vendor-advisory
- VulnCheck Advisory: SiYuan before 3.7.4 Local Privilege Escalation via elevator.exethird-party-advisory
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