RCE in Trendnet Tew-821dap
CVE-2026-15486
A vulnerability has been found in TRENDnet TEW-821DAP 1.11B03. This affects the function sub_42026C of the file /goform/tools_ddns of the component Firmware Update Handler. Such manipulation of the argument hostname/username/password leads to os command injection. The attack can be launched remotely. The vendor explains: "We are unable to confirm the existence of the vulnerabilities for (...) TEW-821DAP (v1.0R) as these items have been EOL. " 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: 0.018 (77.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Trendnet Tew-821dap — versions 1.11B03
Weakness classification (CWE)
References
- vuldb.com/vuln/377793 (technical-description, vdb-entry)
- vuldb.com/vuln/377793/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-15486 (third-party-advisory)
- vuldb.com/submit/842383 (third-party-advisory)
- github.com/IOTRes/IOT_Firmware_Update/blob/main/Trendnet/TEW-821DAP_CI4.md (patch)
Frequently asked questions
- What is CVE-2026-15486?
- CVE-2026-15486 is a medium-severity vulnerability in Trendnet Tew-821dap, classified under Command Injection. CVSS score: 6.3/10. Published 2026-07-12.
- How severe is CVE-2026-15486?
- Medium severity. CVSS v3 base score is 6.3 out of 10.