CVE-2026-7633 — Totolink N300RH 6.1c.1353_B20190305 Vulnerability

title: CVE-2026-7633 - Totolink N300RH File Inclusion via cstecgi.cgi
id: scw-2026-05-02-ai-1
status: experimental
level: critical
description: |
  Detects attempts to exploit CVE-2026-7633 by targeting the setUploadSetting function in Totolink N300RH devices. The rule specifically looks for POST requests to '/cgi-bin/cstecgi.cgi' containing the 'FileName=' parameter, which is indicative of a file inclusion attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-02
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7633/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/cgi-bin/cstecgi.cgi'
      cs-uri-query|contains:
          - 'FileName='
      cs-method|exact:
          - 'POST'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse