CVE-2026-7609: OS Command Injection in TRENDnet TEW-821DAP
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 has been published and may be used. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.
AI Analysis
Technical Summary
This vulnerability involves OS command injection in the tools_diagnostic function of the TRENDnet TEW-821DAP router firmware (up to version 1.12B01). The issue arises from improper handling of input in the /tmp/diagnostic file used during firmware update processes, enabling remote attackers to execute arbitrary operating system commands. The vendor has declared the affected hardware version (v1.xR) obsolete and no longer supported, with no patches provided. The exploit code has been published, but the device is end-of-life and not sold anymore.
Potential Impact
Successful exploitation could allow remote attackers to execute arbitrary OS commands on the affected device, potentially leading to unauthorized control or disruption. However, since the affected product is end-of-life and no longer supported or sold, the practical impact is limited to existing deployed devices that remain in use without vendor support.
Mitigation Recommendations
No official patch or remediation is available due to the product being end-of-life and unsupported for over 8 years. Users should consider replacing affected TRENDnet TEW-821DAP devices with supported hardware to mitigate risk. Patch status is not confirmed; check vendor advisories if any new information arises.
CVE-2026-7609: OS Command Injection in TRENDnet TEW-821DAP
Description
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 has been published and may be used. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.
CVSS v4.0
Score 5.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves OS command injection in the tools_diagnostic function of the TRENDnet TEW-821DAP router firmware (up to version 1.12B01). The issue arises from improper handling of input in the /tmp/diagnostic file used during firmware update processes, enabling remote attackers to execute arbitrary operating system commands. The vendor has declared the affected hardware version (v1.xR) obsolete and no longer supported, with no patches provided. The exploit code has been published, but the device is end-of-life and not sold anymore.
Potential Impact
Successful exploitation could allow remote attackers to execute arbitrary OS commands on the affected device, potentially leading to unauthorized control or disruption. However, since the affected product is end-of-life and no longer supported or sold, the practical impact is limited to existing deployed devices that remain in use without vendor support.
Mitigation Recommendations
No official patch or remediation is available due to the product being end-of-life and unsupported for over 8 years. Users should consider replacing affected TRENDnet TEW-821DAP devices with supported hardware to mitigate risk. Patch status is not confirmed; check vendor advisories if any new information arises.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-01T12:07:34.727Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f5c597cbff5d8610c60a12
Added to database: 5/2/2026, 9:36:23 AM
Last enriched: 5/10/2026, 2:08:57 AM
Last updated: 6/16/2026, 9:01:55 AM
Views: 86
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.