What’s Vulnerable › Vulnerabilities

CVE-2024-40719: CHANGING Information Technology TCBServiSign Windows Version - Inadequate Encryption Strength

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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-326

Description

The encryption strength of the authorization keys in CHANGING Information Technology TCBServiSign Windows Version is insufficient. When a remote attacker tricks a victim into visiting a malicious website, TCBServiSign will treat that website as a legitimate server and interact with it.

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-139-7970-e8ac5-2.html
• https://www.twcert.org.tw/tw/cp-132-7964-5b266-1.html

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