CVE-2025-70123

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/free5gc/free5gc/issues/745Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: Feb 13, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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