CVE-2026-8259 Tenda AC6 httpd telnet os command injection

Medium 5.1 Published 11 May 2026 Updated 11 May 2026

Remote attackers can execute arbitrary OS commands on Tenda AC6 routers via the telnet interface, potentially compromising the device.

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-2026-8259?

CVE-2026-8259 is a medium-severity command injection vulnerability in Tenda Ac6 Firmware, published on 11 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability has been found in Tenda AC6 2.0/15.03.06.23. The affected element is an unknown function of the file /goform/telnet of the component httpd. The manipulation of the argument lan.ip leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-8259?

It affects 1 product.

Products include Tenda Ac6 Firmware.

How do I fix CVE-2026-8259?

No fix has been published for CVE-2026-8259 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-2026-8259 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8259 exists.

All Tenda Ac6 Firmware vulnerabilities

Sources

Also known as GHSA-59c7-jp82-73fm.