How severe is CVE-2024-56921?

CVE-2024-56921 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-56921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-56921?

CVE-2024-56921 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-56921?

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-2024-56921 have an EU (EUVD) identifier?

Yes. CVE-2024-56921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53450.

When was CVE-2024-56921 published?

CVE-2024-56921 was published on 2025-02-03 and last updated on 2026-06-17.

CVE-2024-56921

CVE-2024-56921 is a high-severity vulnerability in Open5gs with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-53450
Weakness: CWE-400
Affected product: Open5gs
Published: 2025-02-03
Last modified: 2026-06-17

Description

An issue was discovered in Open5gs v2.7.2. InitialUEMessage, Registration request sent at a specific time can crash AMF due to incorrect error handling of gmm_state_exception() function upon receipt of the Nausf_UEAuthentication_Authenticate response.

Frequently asked questions

What is CVE-2024-56921?: An issue was discovered in Open5gs v2.7.2. InitialUEMessage, Registration request sent at a specific time can crash AMF due to incorrect error handling of gmm_state_exception() function upon receipt of the Nausf_UEAuthentication_Authenticate response.
How severe is CVE-2024-56921?: CVE-2024-56921 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-56921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-56921?: CVE-2024-56921 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-56921?: 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-2024-56921 have an EU (EUVD) identifier?: Yes. CVE-2024-56921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53450.
When was CVE-2024-56921 published?: CVE-2024-56921 was published on 2025-02-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:open5gs:open5gs:2.7.2:*:*:*:*:*:*:*

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