CVE-2026-7609 TRENDnet TEW-821DAP Firmware Udpate diagnostic tools_diagnostic os command injection
Remote attackers can execute arbitrary OS commands on the end-of-life TRENDnet TEW-821DAP via the diagnostic tool, requiring immediate replacement of the unsupported device.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7609?
CVE-2026-7609 is a medium-severity command injection vulnerability in TRENDnet TEW-821DAP, published on 2 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-7609?
It affects 1 product.
Products include Trendnet Tew-821dap Firmware.
How do I fix CVE-2026-7609?
No fix has been published for CVE-2026-7609 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-7609 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7609 exists.
Other vulnerabilities in TRENDnet TEW-821DAP
Sources
Also known as GHSA-qx7x-73f2-8q44.