CVE-2026-8190 — Command Injection

title: CVE-2026-8190 Wavlink NU516U1 Command Injection via adm.cgi
id: scw-2026-05-09-ai-1
status: experimental
level: critical
description: |
  Detects attempts to exploit CVE-2026-8190 by targeting the adm.cgi script on Wavlink NU516U1 devices. The rule specifically looks for the presence of the vulnerable script path and the parameters used for command injection (ppp_username, ppp_passwd, rwan_ip, rwan_mask, rwan_gateway) within the URI query string. This indicates a potential remote command injection attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-09
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8190/
tags:
  - attack.execution
  - attack.t1059.004
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/cgi-bin/adm.cgi'
      cs-uri-query|contains:
          - 'ppp_username='
          - 'ppp_passwd='
          - 'rwan_ip='
          - 'rwan_mask='
          - 'rwan_gateway='
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse