CVE-2017-18374 Hardcoded credentials in n/a

High 8.8 Published 2 May 2019 Updated 5 Aug 2024

Hardcoded default credentials in ZyXEL routers allow attackers to log in, change settings, and execute commands via authenticated injection.

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

What is CVE-2017-18374?

CVE-2017-18374 is a high-severity vulnerability in n/a, published on 2 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The ZyXEL P660HN-T1A v1 TCLinux Fw $7.3.15.0 v001 / 3.40(ULM.0)b31 router distributed by TrueOnline has two user accounts with default passwords, including a hardcoded service account with the username true and password true. These accounts can be used to login to the web interface, exploit authenticated command injections and change router settings for malicious purposes.

Weakness: CWE-798

Which versions are affected by CVE-2017-18374?

It affects 3 products.

Products include Billion 5200w-T Firmware, Zyxel P660hn-T1a V1 Firmware, Zyxel P660hn-T1a V2 Firmware.

How do I fix CVE-2017-18374?

No fix has been published for CVE-2017-18374 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-18374 being exploited?

There is no known exploitation of CVE-2017-18374 in the wild and no public exploit code.

Sources

Also known as GHSA-3r7r-mrpq-cx9g.