CVE-2026-6058 Cross-site scripting in WRE6505 v2 firmware

Medium 4.5 Published 21 Apr 2026 Updated 21 Apr 2026

An adjacent attacker can cause a denial-of-service in the web interface by tricking an admin into visiting a page with a malformed SSID.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-6058?

CVE-2026-6058 is a medium-severity cross-site scripting vulnerability in Zyxel WRE6505 v2 firmware, published on 21 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

** UNSUPPORTED WHEN ASSIGNED ** An improper encoding or escaping vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the WLAN to cause a denial-of-service (DoS) condition in the web management interface by convincing an authenticated administrator to visit the “AP Select” page while a malformed SSID is present.

Weakness: CWE-116

Which versions are affected by CVE-2026-6058?

It affects 1 product.

Products include Zyxel Wre6505 Firmware.

How do I fix CVE-2026-6058?

No fix has been published for CVE-2026-6058 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-6058 being exploited?

There is no known exploitation of CVE-2026-6058 in the wild and no public exploit code.

Sources

Also known as GHSA-xj2v-mgxg-mcm4.