---
id: CVE-2026-75439
title: >-
  An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of
  service via the UPF component
summary: >-
  An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of
  service via the UPF component
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
published: '2026-09-04'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T14:17:09.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75439'
references:
  - url: 'https://gist.github.com/hackeryounow/0f434c03008462e6eec3b43ed3cd12d8'
    label: cve@mitre.org
  - url: 'https://github.com/free5gc/free5gc/issues/1059'
    label: cve@mitre.org
  - url: >-
      https://github.com/free5gc/free5gc/issues/1059.https://github.com/free5gc/go-upf/pull/97
    label: cve@mitre.org
  - url: 'https://github.com/free5gc/go-upf/pull/97'
    label: cve@mitre.org
  - url: 'https://github.com/hackeryounow/5GCVulDB/tree/main/CVE-2026-75439'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-14T13:10:31.465834Z'
epss: 0.00759
epssPercentile: 0.53399
ingestedAt: '2026-09-08T20:10:03.168Z'
---

## Overview

An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.