CVE•Published 2026-05-27•Modified 2026-05-28•0 articles on news•6 live references•NVD data

CVE-2026-42082Free5gc · Free5gc

Vulnerability data via NVD (ingested)

CVSS v3.1

3.7

LOW

CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS percentile

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Weaknesses (CWE)

CWE-358Improperly Implemented Security Check for Standard

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.

Timeline

Published 2026-05-27

Modified 2026-05-28

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-42082

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Free5gc Free5gc"

All exposed Free5gc Free5gc instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Free5gc"

HTTP body or banner mentions "Free5gc" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42082