CVE-2024-40722: Changingtec Tcb Servisign

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

The specific API in TCBServiSign Windows Version from CHANGING Information Technology does does not properly validate the length of server-side input. When a user visits a spoofed website, unauthenticated remote attackers can cause a stack-based buffer overflow in the TCBServiSign, temporarily disrupting its service.

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.