RCE in Trendnet Tew-821dap
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 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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.057 (92.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.057 · change: +0.016
Affected products
- Trendnet Tew-821dap — versions 1.0r, 1.12B01
- Trendnet Tew-821dap Firmware — versions 1.12b01
Weakness classification (CWE)
References
- vuldb.com/vuln/360566 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/360566/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/806216 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/IOTRes/IOT_Firmware_Update/blob/main/Trendnet/TEW-821DAP_CI2.md (Exploit, Third Party Advisory, exploit, patch)
Frequently asked questions
- What is CVE-2026-7609?
- CVE-2026-7609 is a medium-severity vulnerability in Trendnet Tew-821dap, classified under Command Injection. CVSS score: 6.3/10. Published 2026-05-02.
- How severe is CVE-2026-7609?
- Medium severity. CVSS v3 base score is 6.3 out of 10.