CVE-2026-8188 — Wavlink NU516U1 M16U1_V240425 Command Injection

title: CVE-2026-8188 Wavlink NU516U1 Command Injection via change_wifi_password
id: scw-2026-05-09-ai-1
status: experimental
level: critical
description: |
  Detects exploitation attempts against CVE-2026-8188 by looking for requests to '/cgi-bin/adm.cgi' that include the 'change_wifi_password' function and specific parameters ('wl_channel', 'wl_Pass', 'EncrypType') which are known to be vulnerable to OS command injection. This rule is specific to the identified vulnerability and targets the initial access vector.
author: SCW Feed Engine (AI-generated)
date: 2026-05-09
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8188/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/cgi-bin/adm.cgi'
      cs-uri-query|contains:
          - 'change_wifi_password'
      cs-uri-query|contains:
          - 'wl_channel='
      cs-uri-query|contains:
          - 'wl_Pass='
      cs-uri-query|contains:
          - 'EncrypType='
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse