CVE-2026-25866
HIGHCVSS v3
7.8
HIGH
EPSS Score
0.0%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 3/9/2026
- Last Modified
- 5/6/2026
Frequently Asked Questions
What is CVE-2026-25866?
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.
Is CVE-2026-25866 actively exploited?
Active exploitation of CVE-2026-25866 has not been confirmed. The EPSS score is 0.0%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-25866?
CVE-2026-25866 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string 3.1.
Is CVE-2026-25866 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.