---
cve: "CVE-2026-74801"
severity: "HIGH"
cvss: 8.6
epss: "26%"
vendor: "siyuan-note"
kev: false
exploited: false
published: "2026-08-17 11:16:40"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T07:50:36+02:00"
---

# CVE-2026-74801

> 8.6 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |

## Referenzen

- <https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vmp7-pm7g-ghcc>
- <https://www.vulncheck.com/advisories/siyuan-before-local-privilege-escalation-via-elevator-exe>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74801) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_