CVE-2021-46010 Auth bypass in n/a

High 8.8 Published 30 Mar 2022 Updated 9 Jul 2026

Predictable session IDs in Totolink routers allow attackers to hijack valid sessions and perform unauthorized actions.

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-2021-46010?

CVE-2021-46010 is a high-severity authentication bypass vulnerability in n/a, published on 30 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Totolink A3100R V5.9c.4577 suffers from Use of Insufficiently Random Values via the web configuration. The SESSION_ID is predictable. An attacker can hijack a valid session and conduct further malicious operations.

Weakness: CWE-330

Which versions are affected by CVE-2021-46010?

It affects 1 product.

Products include Totolink A3100r Firmware.

How do I fix CVE-2021-46010?

No fix has been published for CVE-2021-46010 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-2021-46010 being exploited?

There is no known exploitation of CVE-2021-46010 in the wild and no public exploit code.

Sources

Also known as GHSA-4q2f-j497-jmqf.