Buffer overflow in Tenda W3
CVE-2026-3974
A vulnerability was identified in Tenda W3 1.0.0.3(2204). This vulnerability affects the function formexeCommand of the file /goform/exeCommand of the component HTTP Handler. Such manipulation of the argument cmdinput leads to stack-based…
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 W3 — versions 1.0.0.3(2204)
Weakness classification (CWE)
References
- VDB-350409 | Tenda W3 HTTP exeCommand formexeCommand stack-based overflow (vdb-entry, technical-description)
- VDB-350409 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #769177 | Tenda W3 V1.0.0.3(2204) Buffer Overflow (third-party-advisory)
- github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formexeCommand-cmdinput-buffer-… (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-3974?
- CVE-2026-3974 is a high-severity vulnerability in Tenda W3, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-12.
- How severe is CVE-2026-3974?
- High severity. CVSS v3 base score is 8.8 out of 10.