CVE-2026-7708 — Denial of Service

title: CVE-2026-7708 - Open5GS UDR Subscription Data Denial of Service
id: scw-2026-05-03-ai-1
status: experimental
level: high
description: |
  This rule detects potential exploitation of CVE-2026-7708, a denial of service vulnerability in Open5GS. It specifically looks for web requests targeting a subscription-related URI with a 'supi_id' parameter, which, when manipulated, can trigger the vulnerability. A 500 status code indicates a server error, which is a common outcome of such a DoS attack.
author: SCW Feed Engine (AI-generated)
date: 2026-05-03
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7708/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/subscription'
      cs-uri-query|contains:
          - 'supi_id='
      sc-status:
          - 500
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse