CVE-2024-40720: Changingtec Tcb Servisign

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The specific API in TCBServiSign Windows Version from CHANGING Information Technology does not properly validate server-side input. When a user visits a spoofed website, unauthenticated remote attackers can modify the `HKEY_CURRENT_USER` registry to execute arbitrary commands.

Affected products

• Changingtec Tcb Servisign: before 1.0.24.0318 (fixed in 1.0.24.0318)

Published 2024-08-02. Last modified 2026-06-17.