Buffer overflow in Tenda I3
CVE-2026-3803
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 i…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (28.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.
Affected products
- Tenda I3 — versions 1.0.0.6(2204)
Weakness classification (CWE)
References
- VDB-349770 | Tenda i3 WifiMacFilterGet formWifiMacFilterGet stack-based overflow (vdb-entry, technical-description)
- VDB-349770 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #768984 | Tenda i3 V1.0.0.6(2204) Buffer Overflow (third-party-advisory)
- github.com/Svigo-o/Tenda_vul/tree/main/tenda-i3-formWifiMacFilterGet-index-buff… (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-3803?
- CVE-2026-3803 is a high-severity vulnerability in Tenda I3, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-09.
- How severe is CVE-2026-3803?
- High severity. CVSS v3 base score is 8.8 out of 10.