How severe is CVE-2024-12839?

CVE-2024-12839 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-12839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-12839?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-12839 have an EU (EUVD) identifier?

Yes. CVE-2024-12839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-51140.

When was CVE-2024-12839 published?

CVE-2024-12839 was published on 2024-12-31 and last updated on 2026-06-17.

CVE-2024-12839

CVE-2024-12839 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-294.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-51140
Weakness: CWE-294
Published: 2024-12-31
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-12839?: 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.
How severe is CVE-2024-12839?: CVE-2024-12839 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-12839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-12839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-12839 have an EU (EUVD) identifier?: Yes. CVE-2024-12839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-51140.
When was CVE-2024-12839 published?: CVE-2024-12839 was published on 2024-12-31 and last updated on 2026-06-17.

References

Other CWE-294 (Authentication Bypass by Capture-replay) vulnerabilities

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