CVE-2026-20764 Copeland XWEB and XWEB Pro OS Command Injection

High 8.0 Published 27 Feb 2026 Updated 2 Mar 2026

Authenticated attackers can execute arbitrary code on Copeland XWEB controllers by injecting commands into the device hostname configuration during system setup.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20764?

CVE-2026-20764 is a high-severity command injection vulnerability in Copeland XWEB 300D PRO, published on 27 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An OS command injection vulnerability exists in XWEB Pro version 1.12.1 and prior, enabling an authenticated attacker to achieve remote code execution on the system by providing malicious input via the device hostname configuration which is later processed during system setup, resulting in remote code execution.

Weakness: CWE-78

Which versions are affected by CVE-2026-20764?

It affects 3 products.

Products include Copeland Xweb 300d Pro Firmware, Copeland Xweb 500b Pro Firmware, Copeland Xweb 500d Pro Firmware.

How do I fix CVE-2026-20764?

No fix has been published for CVE-2026-20764 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-2026-20764 being exploited?

There is no known exploitation of CVE-2026-20764 in the wild and no public exploit code.

Sources

Also known as GHSA-hv3r-jwfx-pvqr.