CVE-2026-7690 — The Function Set_sys_adm Of The File /Cgi-Bin/Adm.Cgi Command Injection

title: CVE-2026-7690 - Command Injection via adm.cgi Username Parameter
id: scw-2026-05-03-ai-1
status: experimental
level: critical
description: |
  Detects exploitation attempts against CVE-2026-7690 by looking for requests to '/cgi-bin/adm.cgi' where the 'Username' parameter is manipulated with characters indicative of command injection (';', '&&', '|'). This targets the specific vulnerability in the set_sys_adm function.
author: SCW Feed Engine (AI-generated)
date: 2026-05-03
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7690/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri:
          - '/cgi-bin/adm.cgi'
      cs-uri-query|contains:
          - 'Username=' 
      cs-uri-query|contains:
          - ';'
      cs-uri-query|contains:
          - '&&'
      cs-uri-query|contains:
          - '|'
      condition: cs-uri AND cs-uri-query
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse