CVE-2021-21881 Command injection in Lantronix

Critical 9.9 Published 22 Dec 2021 Updated 3 Aug 2024

An authenticated attacker can execute arbitrary OS commands via a crafted HTTP request in the Lantronix PremierWave Web Manager.

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-2021-21881?

CVE-2021-21881 is a critical command injection vulnerability in Lantronix, published on 22 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An OS command injection vulnerability exists in the Web Manager Wireless Network Scanner functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted HTTP request can lead to command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Weakness: CWE-78

Which versions are affected by CVE-2021-21881?

It affects 1 product.

Products include Lantronix Premierwave 2050 Firmware.

How do I fix CVE-2021-21881?

No fix has been published for CVE-2021-21881 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-2021-21881 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21881 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as GHSA-fm7j-3jwj-3cr6.