CVE-2026-7609 — TRENDnet TEW-821DAP Command Injection

May 02, 2026 13:16 /MEDIUM /CVSS 6.3/10

Written by SCW Vulnerability Desk Vulnerability Intelligence

National Vulnerability Database vulnerabilitycvemedium-severitycommand-injectioncwe-77cwe-78

CVE-2026-7609 — TRENDnet TEW-821DAP Command Injection

CVE-2026-7609 — A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit ha

What This Means For You

If your environment is affected by CWE-77, CWE-78, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-7609 updates and patches.

Related ATT&CK Techniques

T1190 Exploit Public-Facing Application Initial Access T1059.004 Command and Scripting Interpreter: Unix Shell Execution

🛡️ Detection Rules

2 rules · 6 SIEM formats

2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.

critical T1190 Initial Access

CVE-2026-7609 TRENDnet TEW-821DAP Command Injection via Diagnostic Tool

Sigma YAML — free preview

title: CVE-2026-7609 TRENDnet TEW-821DAP Command Injection via Diagnostic Tool
id: scw-2026-05-02-ai-1
status: experimental
level: critical
description: |
  Detects attempts to exploit CVE-2026-7609 by targeting the tools_diagnostic function in TRENDnet TEW-821DAP firmware. The exploit involves sending commands like 'ping' or 'traceroute' through the diagnostic tool, leading to OS command injection. This rule specifically looks for the diagnostic tool endpoint and common diagnostic commands used in exploit attempts.
author: SCW Feed Engine (AI-generated)
date: 2026-05-02
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7609/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/tools_diagnostic'
      cs-uri-query|contains:
          - 'ping'
          - 'traceroute'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse

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Indicators of Compromise

ID	Type	Indicator
CVE-2026-7609	vulnerability	CVE-2026-7609
CWE-77	weakness	CWE-77
CWE-78	weakness	CWE-78

Written by SCW Vulnerability Desk

Source & Attribution

Source Platform	NVD
Channel	National Vulnerability Database
Published	May 02, 2026 at 13:16 UTC

This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.

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