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7.4
Tenda i3 Router: Remote Code Execution through Malicious Index
CVE-2026-3803
Summary
A vulnerability in Tenda i3 routers allows hackers to potentially take control of the device remotely. This is because of a flaw in how the router handles data, which could lead to unauthorized access and code execution. Update your router's firmware to the latest version to fix this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| tenda | i3_firmware | 1.0.0.6\(2204\) | – |
Original title
A vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. The manipulation of the argument index leads to stack-...
Original description
A vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. The manipulation of the argument index leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
nvd CVSS2.0
9.0
nvd CVSS3.1
8.8
nvd CVSS4.0
7.4
Vulnerability type
CWE-119
Buffer Overflow
CWE-121
Stack-based Buffer Overflow
Published: 9 Mar 2026 · Updated: 13 Mar 2026 · First seen: 9 Mar 2026