What’s Vulnerable › Vulnerabilities

CVE-2024-12839: Changing Information Technology CGFIDO - Authentication Bypass

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-31 · updated 2026-06-17
• Weakness: CWE-294

Description

The login mechanism via device authentication of CGFIDO from Changing Information Technology has an Authentication Bypass vulnerability. If a user visits a forged website, the agent program deployed on their device will send an authentication signature to the website. An unauthenticated remote attacker who obtains this signature can use it to log into the system with any device.

Affected products

• Changing Information Technology CGFIDO: before 1.2.1 — fixed in 1.2.1

How to fix

Upgrade to a fixed version: Changing Information Technology CGFIDO 1.2.1. Check the vendor advisory for mitigations.

References

• https://www.twcert.org.tw/en/cp-139-8335-e4a3f-2.html
• https://www.twcert.org.tw/tw/cp-132-8334-8b836-1.html

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