CVE-2026-25866 MobaXterm < 26.1 Notepad++ Unquoted Service Path
An attacker can execute arbitrary code by placing a malicious executable in the search path when MobaXterm launches Notepad++.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-25866?
CVE-2026-25866 is a high-severity path traversal vulnerability in Mobatek MobaXterm, published on 9 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
MobaXterm versions prior to 26.1 contain an uncontrolled search path element vulnerability. The application calls WinExec to execute Notepad++ without a fully qualified executable path when opening remote files. An attacker can exploit the search path behavior by placing a malicious executable earlier in the search order, resulting in arbitrary code execution in the context of the affected user.
Weakness: CWE-428
Which versions are affected by CVE-2026-25866?
It affects 1 product.
Products include Mobatek Mobaxterm.
How do I fix CVE-2026-25866?
No fix has been published for CVE-2026-25866 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-25866 being exploited?
There is no known exploitation of CVE-2026-25866 in the wild and no public exploit code.
Other vulnerabilities in Mobatek MobaXterm
Sources
Also known as GHSA-5483-8h5w-c2hp.