CVE-2021-4039 Command injection in NWA1100-NH firmware
An attacker can execute arbitrary OS commands on the Zyxel NWA-1100-NH via its web interface, requiring a firmware patch.
- 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-2021-4039?
CVE-2021-4039 is a critical command injection vulnerability in Zyxel NWA1100-NH firmware, published on 1 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device.
Weakness: CWE-78
Which versions are affected by CVE-2021-4039?
It affects 1 product.
Products include Zyxel Nwa1100-Nh Firmware.
How do I fix CVE-2021-4039?
No fix has been published for CVE-2021-4039 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-2021-4039 being exploited?
There is no known exploitation of CVE-2021-4039 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Sources
Also known as GHSA-9ww2-qwrq-m7wv.