CVE-2022-42785 Wiesemann & Theis: Authentication bypass in Com-Server family

Critical 9.8 Published 10 Nov 2022 Updated 1 May 2025

Unauthenticated remote attackers can bypass authentication on W&T Com-Server devices by crafting a modified HTTP GET request.

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-2022-42785?

CVE-2022-42785 is a critical authentication bypass vulnerability in Wiesemann & Theis AT-Modem-Emulator, published on 10 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Multiple W&T products of the ComServer Series are prone to an authentication bypass. An unathenticated remote attacker, can log in without knowledge of the password by crafting a modified HTTP GET Request.

Weakness: CWE-306

Which versions are affected by CVE-2022-42785?

It affects 17 products.

Products include Wut At-Modem-Emulator Firmware, Wut Com-Server 20ma Firmware, Wut Com-Server \+\+ Firmware, Wut Com-Server Highspeed 100basefx Firmware, Wut Com-Server Highspeed 100baselx Firmware, Wut Com-Server Highspeed 19\" 1port Firmware and 11 more.

How do I fix CVE-2022-42785?

No fix has been published for CVE-2022-42785 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2022-42785 being exploited?

There is no known exploitation of CVE-2022-42785 in the wild and no public exploit code.

Sources

Also known as GHSA-pvg6-pm5h-p2q2.