What’s Vulnerable › Vulnerabilities

CVE-2024-40720: CHANGING Information Technology TCBServiSign Windows Version - Improper Input Validation

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-02 · updated 2026-06-17
• Weakness: CWE-20

Description

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

• CHANGING Information Technology TCBServiSign Windows Version: before 1.0.24.0318 — fixed in 1.0.24.0318

How to fix

Upgrade to a fixed version: CHANGING Information Technology TCBServiSign Windows Version 1.0.24.0318. Check the vendor advisory for mitigations.

References

• https://www.twcert.org.tw/en/cp-139-7971-d9584-2.html
• https://www.twcert.org.tw/tw/cp-132-7965-8285d-1.html

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