CVE-2021-20158 Auth bypass in Trendnet AC2600 TEW-827DRU

Critical 9.8 Published 30 Dec 2021 Updated 3 Aug 2024

An unauthenticated attacker can change the admin password via a hidden command, gaining full control of the Trendnet router.

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

What is CVE-2021-20158?

CVE-2021-20158 is a critical authentication bypass vulnerability in Trendnet AC2600 TEW-827DRU, published on 30 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.

Weakness: CWE-306

Which versions are affected by CVE-2021-20158?

It affects 1 product.

Products include Trendnet Tew-827dru Firmware.

How do I fix CVE-2021-20158?

No fix has been published for CVE-2021-20158 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-2021-20158 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-20158 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-3r6m-8r6h-j558.