CVE-2025-6139 TOTOLINK T10 shadow.sample hard-coded password

Low 2.0 Published 16 Jun 2025 Updated 17 Jun 2025

Hard-coded credentials in the shadow.sample file allow local network attackers to bypass authentication and gain elevated privileges.

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-2025-6139?

CVE-2025-6139 is a low-severity vulnerability in TOTOLINK T10, published on 16 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability, which was classified as problematic, has been found in TOTOLINK T10 4.1.8cu.5207. Affected by this issue is some unknown functionality of the file /etc/shadow.sample. The manipulation leads to use of hard-coded password. The attack can only be initiated within the local network. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.

Weakness: CWE-259, CWE-255

Which versions are affected by CVE-2025-6139?

It affects 1 product.

Products include Totolink T10 Firmware.

How do I fix CVE-2025-6139?

No fix has been published for CVE-2025-6139 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-6139 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6139 exists.

Sources

Also known as GHSA-596f-hgfj-9vg7.