How severe is CVE-2026-42082?

CVE-2026-42082 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2026-42082 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42082?

CVE-2026-42082 affects Free5gc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42082?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42082 have an EU (EUVD) identifier?

Yes. CVE-2026-42082 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32556.

When was CVE-2026-42082 published?

CVE-2026-42082 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2026-42082

CVE-2026-42082 is a low-severity vulnerability in Free5gc with a CVSS 3.x base score of 3.7. 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-358.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32556
Weakness: CWE-358
Affected product: Free5gc
Published: 2026-05-27
Last modified: 2026-06-17

Description

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. The AMF does not check for ongoing N2 handover procedures before initiating a NAS Security Mode Command, and vice versa. This can lead to mismatches between NAS and AS security contexts in the network and the UE. This vulnerability is fixed in 4.2.2.

Frequently asked questions

What is CVE-2026-42082?: free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. The AMF does not check for ongoing N2 handover procedures before initiating a NAS Security Mode Command, and vice versa. This can lead to mismatches between NAS and AS security contexts in the network and the UE. This vulnerability is fixed in 4.2.2.
How severe is CVE-2026-42082?: CVE-2026-42082 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2026-42082 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42082?: CVE-2026-42082 affects Free5gc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42082?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42082 have an EU (EUVD) identifier?: Yes. CVE-2026-42082 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32556.
When was CVE-2026-42082 published?: CVE-2026-42082 was published on 2026-05-27 and last updated on 2026-06-17.

References

https://github.com/free5gc/free5gc/security/advisories/GHSA-vrrx-58h3-prmh

Affected products (1)

cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

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