---
id: CVE-2025-15687
title: A security flaw has been discovered in Open5GS up to 2.7.6
summary: >-
  A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the
  function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer
  Handler. The manipulation results in denial of service. The attack can be
  launched …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-404
published: '2026-08-12'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T11:10:00.150'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-15687'
references:
  - url: 'https://github.com/open5gs/open5gs/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/open5gs/open5gs/commit/f23d7a5e959acd8f37b925dc29b85f26b7d391cb
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/issues/4027'
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/pull/4034'
    label: cna@vuldb.com
  - url: 'https://github.com/open5gs/open5gs/releases/tag/v2.7.7'
    label: cna@vuldb.com
  - url: 'https://github.com/user-attachments/files/21515527/SMF.crashes.zip'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2025-15687'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/867119'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/387283'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/387283/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-09-29T11:32:41.233Z'
epss: 0.00639
epssPercentile: 0.48568
---

## Overview

A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue. The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised.

## Remediation

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