CVE-2026-7256 Command injection in WRE6505 v2 firmware

High 8.8 Published 12 May 2026 Updated 12 May 2026

Adjacent attackers can execute OS commands on unsupported Zyxel WRE6505 v2 devices via crafted HTTP requests.

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-2026-7256?

CVE-2026-7256 is a high-severity command injection vulnerability in Zyxel WRE6505 v2 firmware, published on 12 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

** UNSUPPORTED WHEN ASSIGNED ** A command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to execute operating system (OS) commands on a vulnerable device by sending a crafted HTTP request.

Weakness: CWE-78

Which versions are affected by CVE-2026-7256?

It affects 1 product.

Products include Zyxel Wre6505 Firmware.

How do I fix CVE-2026-7256?

No fix has been published for CVE-2026-7256 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-2026-7256 being exploited?

There is no known exploitation of CVE-2026-7256 in the wild and no public exploit code.

Sources

Also known as GHSA-c7j6-24cr-x2rf.