CVE-2026-11879 Arbitrary code execution in MobaXterm Personal Edition (Portable)
Local attackers can execute arbitrary code by placing malicious DLLs in a predictable temporary directory loaded by MobaXterm during startup.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11879?
CVE-2026-11879 is a high-severity code injection vulnerability in Mobatek MobaXterm Personal Edition (Portable), published on 12 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
MobaXterm Personal Edition (Portable), in its 26.3 version (Build 5154), allows arbitrary code execution by loading malicious DLLs from a temporary directory that is predictable and can be modified by the user. During startup, the application searches for specific DLLs in this location before resorting to the system’s secure paths, enabling an attacker with local access to place a specially crafted DLL to be executed automatically when the victim launches the application.
Weakness: CWE-427
Which versions are affected by CVE-2026-11879?
How do I fix CVE-2026-11879?
No fix has been published for CVE-2026-11879 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-11879 being exploited?
There is no known exploitation of CVE-2026-11879 in the wild and no public exploit code.
Sources
Also known as GHSA-9626-78xh-92cx.