What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-09 · updated 2026-06-17
• Weakness: CWE-428

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

• Mobatek MobaXterm: before 26.1 — fixed in 26.1

How to fix

Upgrade to a fixed version: Mobatek MobaXterm 26.1. Check the vendor advisory for mitigations.

References

• https://mobaxterm.mobatek.net/download-home-edition.html
• https://www.vulncheck.com/advisories/mobaxterm-notepad-unquoted-service-path

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