CVE-2021-43711 Command injection in n/a

Critical 9.8 Published 4 Jan 2022 Updated 4 Aug 2024

Unauthenticated attackers can execute arbitrary commands on TOTOLINK EX200 routers via the downloadFlile.cgi binary.

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-2021-43711?

CVE-2021-43711 is a critical command injection vulnerability in n/a, published on 4 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The downloadFlile.cgi binary file in TOTOLINK EX200 V4.0.3c.7646_B20201211 has a command injection vulnerability when receiving GET parameters. The parameter name can be constructed for unauthenticated command execution.

Weakness: CWE-77

Which versions are affected by CVE-2021-43711?

It affects 1 product.

Products include Totolink Ex200 Firmware.

How do I fix CVE-2021-43711?

No fix has been published for CVE-2021-43711 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-2021-43711 being exploited?

There is no known exploitation of CVE-2021-43711 in the wild and no public exploit code.

Sources

Also known as GHSA-chwf-9c6x-wv85.