CVE-2026-0774 WatchYourLAN Configuration Page Argument Injection Remote Code Execution Vulnerability
Network-adjacent attackers can execute arbitrary code via argument injection in the arpstrs parameter without authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0774?
CVE-2026-0774 is a high-severity command injection vulnerability in WatchYourLAN, published on 23 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
WatchYourLAN Configuration Page Argument Injection Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of WatchYourLAN. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of the arpstrs parameter. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-26708.
Weakness: CWE-88
Which versions are affected by CVE-2026-0774?
How do I fix CVE-2026-0774?
No fix has been published for CVE-2026-0774 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-0774 being exploited?
There is no known exploitation of CVE-2026-0774 in the wild and no public exploit code.
Sources
Also known as GHSA-6rcp-wvh6-8qh8.