What is CVE-2026-0774?

CVE-2026-0774 is a high-severity vulnerability in Watchyourlan, classified under Argument Injection. CVSS score: 8.8/10. Published 2026-01-23.

How severe is CVE-2026-0774?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Watchyourlan

CVE-2026-0774

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.

EPSS: 0.007 (48.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Watchyourlan — versions 2.1.2

Weakness classification (CWE)

CWE-88 — Argument Injection

References

zdi-disclosures@trendmicro.com (x_research-advisory)

Frequently asked questions

What is CVE-2026-0774?: CVE-2026-0774 is a high-severity vulnerability in Watchyourlan, classified under Argument Injection. CVSS score: 8.8/10. Published 2026-01-23.
How severe is CVE-2026-0774?: High severity. CVSS v3 base score is 8.8 out of 10.