CVE-2026-74801— SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe
Affected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| siyuan-note | siyuan | < 3.7.4 | affected |
3.7.4 | unaffected |
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I. Basic Information for CVE-2026-74801
Vulnerability Information
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Vulnerability Title
SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
SiYuan 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan团队开源的一款文档管理软件。 SiYuan 3.7.4之前版本存在命令注入漏洞，该漏洞源于未能正确转义工作区目录路径，可能导致攻击者创建包含命令元字符的恶意工作区目录，触发Microsoft Defender排除流程，在UAC批准后以管理员权限执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| siyuan-note | siyuan | 0 ~ 3.7.4 | - |
II. Public POCs for CVE-2026-74801
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-74801 (2)
Same Patch Batch · siyuan-note · 2026-08-17 · 7 CVEs total
| CVE-2026-74799 | 9.3 CRITICAL | SiYuan before 3.7.4 Unauthenticated Debug Endpoint Information Disclosure |
| CVE-2026-74800 | 9.0 CRITICAL | SiYuan before v3.7.4 Stored XSS via assets endpoint |
| CVE-2026-74798 | 8.7 HIGH | SiYuan kernel Path Traversal via database_clean MCP tool |
| CVE-2026-74802 | 8.2 HIGH | SiYuan 3.7.3 Cross-Site WebSocket Hijacking via network proxy |
| CVE-2026-74868 | 7.5 HIGH | SiYuan before 3.7.4 Brute-Force Authentication via Publish Service |
| CVE-2026-74867 | 4.2 MEDIUM | SiYuan before 3.7.4 Cross-Site Request Forgery via CheckAuth |
IV. Related Vulnerabilities
Same product: siyuan
- CVE-2026-77086
SiYuan before v3.7.4 Path Traversal via packageName - CVE-2026-75917
SiYuan before v3.7.4 XSS-to-RCE via pathName.ts - CVE-2026-75916
SiYuan XSS-to-RCE via unescaped block metadata in hint popup - CVE-2026-74906
SiYuan before v3.7.4 Incorrect Authorization via Publish Acc - CVE-2026-74905
SiYuan before v3.7.4 SSRF via IPv6 Transition Address Bypass
Same vendor: siyuan-note
- CVE-2026-77086
SiYuan before v3.7.4 Path Traversal via packageName - CVE-2026-75917
SiYuan before v3.7.4 XSS-to-RCE via pathName.ts - CVE-2026-75916
SiYuan XSS-to-RCE via unescaped block metadata in hint popup - CVE-2026-74906
SiYuan before v3.7.4 Incorrect Authorization via Publish Acc - CVE-2026-74905
SiYuan before v3.7.4 SSRF via IPv6 Transition Address Bypass
Same weakness: CWE-78
- CVE-2026-41451
UAC < 3.3.0 Command Injection via User Substitution in parse - CVE-2026-41450
UAC < 3.3.0 Command Injection via command_collector.sh - CVE-2026-41449
UAC < 3.3.0 Command Injection via run_command.sh - CVE-2026-47359
Apache CloudStack: OS Command Injection due to unsanitized m - CVE-2026-50112
Apache CloudStack: RCE and SSRF in direct download, metalink
V. Comments for CVE-2026-74801
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