CVE-2026-8228 — Wavlink NU516U1 Command Injection

title: CVE-2026-8228 Wavlink NU516U1 Command Injection via wireless.cgi
id: scw-2026-05-10-ai-1
status: experimental
level: critical
description: |
  Detects exploitation attempts against Wavlink NU516U1 devices targeting CVE-2026-8228. The rule specifically looks for requests to '/cgi-bin/wireless.cgi' containing the vulnerable parameter 'wlan_conf/Channel/skiplist/ieee_80211h' and common command injection characters like '&&', ';', or '|' within the query string. This indicates an attempt to inject and execute arbitrary OS commands.
author: SCW Feed Engine (AI-generated)
date: 2026-05-10
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8228/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/cgi-bin/wireless.cgi'
      cs-uri-query|contains:
          - 'wlan_conf/Channel/skiplist/ieee_80211h'
      cs-uri-query|contains:
          - '&&'
      cs-uri-query|contains:
          - ';'
      cs-uri-query|contains:
          - '|'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse