CVE-2026-7255 Auth bypass in WRE6505 v2 firmware

Medium 6.5 Published 12 May 2026 Updated 12 May 2026

An adjacent attacker can brute-force passwords to bypass authentication in the Zyxel WRE6505 v2 web management interface.

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-2026-7255?

CVE-2026-7255 is a medium-severity authentication bypass 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 ** An improper restriction of excessive authentication attempts vulnerability in the web management interface of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to brute-force the password and bypass authentication.

Weakness: CWE-307

Which versions are affected by CVE-2026-7255?

It affects 1 product.

Products include Zyxel Wre6505 Firmware.

How do I fix CVE-2026-7255?

No fix has been published for CVE-2026-7255 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-7255 being exploited?

There is no known exploitation of CVE-2026-7255 in the wild and no public exploit code.

Sources

Also known as GHSA-2rgv-5m49-97j4.