CVE-2021-21886 Path traversal in Lantronix

Medium 4.3 Published 22 Dec 2021 Updated 3 Aug 2024

An authenticated attacker can exploit a directory traversal flaw in the Web Manager to disclose sensitive information from the device.

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-2021-21886?

CVE-2021-21886 is a medium-severity path traversal 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

A directory traversal vulnerability exists in the Web Manager FSBrowsePage functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially crafted HTTP request can lead to information disclosure. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Weakness: CWE-22

Which versions are affected by CVE-2021-21886?

It affects 1 product.

Products include Lantronix Premierwave 2050 Firmware.

How do I fix CVE-2021-21886?

No fix has been published for CVE-2021-21886 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-21886 being exploited?

There is no known exploitation of CVE-2021-21886 in the wild and no public exploit code.

Sources

Also known as GHSA-73jg-9gc6-fg9c.