CVE-2019-25741 Mobatek MobaXterm 12.1 Buffer Overflow via Sessions File
Remote attackers can execute arbitrary code by tricking users into importing a malicious session file in MobaXterm.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-25741?
CVE-2019-25741 is a critical memory corruption vulnerability in Mobatek MobaXterm, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Mobatek MobaXterm 12.1 contains a structured exception handling (SEH) based buffer overflow vulnerability in the username field of session files that allows remote attackers to execute arbitrary code. Attackers can craft a malicious MobaXterm sessions file with overflow data that triggers the vulnerability when imported and executed, enabling reverse shell execution with user privileges.
Weakness: CWE-120
Which versions are affected by CVE-2019-25741?
How do I fix CVE-2019-25741?
No fix has been published for CVE-2019-25741 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-25741 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25741 exists.
Sources
Also known as GHSA-288f-q89m-r9qr.