Vulnerability · Published Mar 9, 2026 · Assigned by VulnCheck

CVE-2026-25866MobaXterm < 26.1 Notepad++ Unquoted Service Path

High 7.8

In plain English

A high-severity security flaw in MobaXterm from Mobatek. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.1%top 95.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Mobatek	MobaXterm	0 – before 26.1

Weakness: CWE-428 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://mobaxterm.mobatek.net/download-home-edition.html release-notes, patch
https://www.vulncheck.com/advisories/mobaxterm-notepad-unquoted-service-path third-party-advisory