CVE-2026-8230 — Wavlink NU516U1 Command Injection

title: CVE-2026-8230 - Wavlink NU516U1 Command Injection via login.cgi
id: scw-2026-05-10-ai-1
status: experimental
level: critical
description: |
  Detects exploitation attempts against Wavlink NU516U1 devices by looking for requests to '/cgi-bin/login.cgi' with the 'ipaddr' parameter containing common command injection characters like backticks, semicolons, pipes, or command substitution syntax. This targets the specific vulnerability CVE-2026-8230.
author: SCW Feed Engine (AI-generated)
date: 2026-05-10
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8230/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/cgi-bin/login.cgi'
      cs-uri-query|contains:
          - 'ipaddr='
      cs-uri-query|contains:
          - '`'
      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