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 …
Exact source revision recorded 28 Oct 2026 05:12:06 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-32556
Publishedfree5GC 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.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: May 27, 2026, 3:59:21 PM
dateUpdated: May 28, 2026, 2:47:44 PM
- Source published
- May 27, 2026, 3:59:21 PM (timezone not stated)
- Source modified
- May 28, 2026, 2:47:44 PM (timezone not stated)
- Observed here
- 28 Oct 2026 05:12:06 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 3.7 CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L