CVE-2026-8189 — Wavlink NU516U1 M16U1_V240425 Command Injection

title: CVE-2026-8189 Wavlink NU516U1 Command Injection via adm.cgi
id: scw-2026-05-09-ai-1
status: experimental
level: critical
description: |
  Detects attempts to exploit CVE-2026-8189 by targeting the adm.cgi script with specific parameters (wlan_bssid, sel_Automode, sel_EncrypTyp) that are vulnerable to OS command injection. This rule specifically looks for the presence of these parameters within the URI query string when accessing the adm.cgi endpoint, indicating a potential exploit attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-09
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8189/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/cgi-bin/adm.cgi'
      cs-uri-query|contains:
          - 'wlan_bssid='
          - 'sel_Automode='
          - 'sel_EncrypTyp='
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse