CVE-2019-25741
MobaXterm 12.1 contains a buffer overflow in the username field of session files. A malicious session file can be imported to run arbitrary code, giving attackers a reverse shell with the user’s privileges. The flaw is exploitable remotely without authentication.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
Mobatek MobaXterm version 12.1 (and possibly earlier releases).
Real-world impact
An attacker can run any code on the victim’s computer, potentially taking full control of the system.
Why this severity
The CVSS score of 9.3 reflects that the vulnerability is remotely exploitable, requires no user interaction, and can compromise confidentiality, integrity, and availability.
What to do about it
- ›Avoid importing untrusted session files into MobaXterm.
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Jun 4, 2026 · Jun 4, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 22, 2026 · 13d agoAdvisory updatedThe NVD record was last revised.