CVE-2021-45742 Command injection in n/a

Critical 9.8 Published 4 Feb 2022 Updated 4 Aug 2024

Attackers can execute arbitrary commands on TOTOLINK A720R routers via the QUERY_STRING parameter in the Main function.

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-2021-45742?

CVE-2021-45742 is a critical command injection vulnerability in n/a, published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TOTOLINK A720R v4.1.5cu.470_B20200911 was discovered to contain a command injection vulnerability in the "Main" function. This vulnerability allows attackers to execute arbitrary commands via the QUERY_STRING parameter.

Weakness: CWE-77

Which versions are affected by CVE-2021-45742?

It affects 1 product.

Products include Totolink A720r Firmware.

How do I fix CVE-2021-45742?

No fix has been published for CVE-2021-45742 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-2021-45742 being exploited?

There is no known exploitation of CVE-2021-45742 in the wild and no public exploit code.

Sources

Also known as GHSA-wcmw-p6qg-rm5r.