CVE-2026-74801 SiYuan before 3.7.4 Local Privilege Escalation via elevator.exe
Attackers can execute arbitrary commands with administrator privileges by exploiting path injection in the elevator helper process.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-74801?
CVE-2026-74801 is a high-severity command injection vulnerability in siyuan-note siyuan, published on 17 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2026-74801?
How do I fix CVE-2026-74801?
No fix has been published for CVE-2026-74801 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-74801 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74801 exists.
Sources
Also known as GHSA-pmhp-gmf7-7vhj.