CVE-2026-0774CWE-88

WatchYourLAN Configuration Page Argument Injection Remote Code Execution Vulnerability

High · published January 23, 2026

CVSS v3.0
8.8
EPSS
1%
Percentile
56.8
In the wild
Unconfirmed
What it is

🚨 A sneaky argument injection in WatchYourLAN could let attackers execute arbitrary code without even logging in! ⚡ Think of it like a restaurant allowing anyone to change the ingredients in their meals without needing to prove they’re a chef — a recipe for disaster! 🍽️ If exploited, an attacker could execute malicious code on the service account, potentially leading to data theft, unauthorized access, or even system manipulation. This is a high-severity vulnerability, and it's crucial to act fast to prevent a scenario where your network becomes a playground for cyber mischief!

Put simply

Think of it like a restaurant allowing anyone to change the ingredients in their meals without needing to prove they’re a chef — a recipe for disaster! 🍽️ The flaw stems from improper validation of the "arpstrs" parameter, which allows an attacker to inject arbitrary commands that the system executes without authentication. Essentially, it's a direct line for attackers to unleash their code!

What to do

If exploited, an attacker could execute malicious code on the service account, potentially leading to data theft, unauthorized access, or even system manipulation. This is a high-severity vulnerability, and it's crucial to act fast to prevent a scenario where your network becomes a playground for cyber mischief! Immediately patch your WatchYourLAN installations to the latest version. Ensure that all parameters, especially user-supplied strings, are thoroughly validated before being used in system calls. Conduct a security audit to check for any other potential vulnerabilities in your network setup. You've got this! With these steps, you can safeguard your network and earn your security hero badge! 🛡️

The record
Technical detail
CVSS v3.0
8.8 · HIGH
Vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00821 · 56.8th percentile
Weakness
CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2026-01-23T03:29Z
EPSS history
Timeline
  • 23 JAN 03:29Z
    WatchYourLAN Configuration Page Argument Injection Remote Code Execution Vulnerability
    cvelistv5