CVE-2021-33538 WEIDMUELLER: WLAN devices affected by improper access control vulnerability

High 8.8 Published 25 Jun 2021 Updated 16 Sep 2024

An attacker with low-privilege access can overwrite user passwords to gain remote shell access on Weidmüller Industrial WLAN devices.

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-2021-33538?

CVE-2021-33538 is a high-severity vulnerability in Weidmüller IE-WL(T)-BL-AP-CL-XX, published on 25 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Weidmueller Industrial WLAN devices in multiple versions an exploitable improper access control vulnerability exists in the iw_webs account settings functionality. A specially crafted user name entry can cause the overwrite of an existing user account password, resulting in remote shell access to the device as that user. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.

Weakness: CWE-269

Which versions are affected by CVE-2021-33538?

It affects 8 products.

Products include Weidmueller Ie-Wl-Bl-Ap-Cl-Eu Firmware, Weidmueller Ie-Wl-Bl-Ap-Cl-Us Firmware, Weidmueller Ie-Wl-Vl-Ap-Br-Cl-Eu Firmware, Weidmueller Ie-Wl-Vl-Ap-Br-Cl-Us Firmware, Weidmueller Ie-Wlt-Bl-Ap-Cl-Eu Firmware, Weidmueller Ie-Wlt-Bl-Ap-Cl-Us Firmware and 2 more.

How do I fix CVE-2021-33538?

No fix has been published for CVE-2021-33538 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-33538 being exploited?

There is no known exploitation of CVE-2021-33538 in the wild and no public exploit code.

Sources

Also known as GHSA-37w8-w2xc-r5mg.