CVE-2021-44554: Cybelesoft Thinfinity Virtualui

Medium severity, CVSS 5.3. EPSS: 1% chance of exploitation in the next 30 days.

Thinfinity VirtualUI before 3.0 allows a malicious actor to enumerate users registered in the OS (Windows) through the /changePassword URI. By accessing the vector, an attacker can determine if a username exists thanks to the message returned; it can be presented in different languages according to the configuration of VirtualUI. Common users are administrator, admin, guest and krgtbt.

Affected products

• Cybelesoft Thinfinity Virtualui: before 3.0 (fixed in 3.0)

Published 2021-12-20. Last modified 2026-06-17.