Buffer overflow in Tenda W3
CVE-2026-3972
A vulnerability was found in Tenda W3 1.0.0.3(2204). Affected by this issue is the function formSetCfm of the file /goform/setcfm of the component HTTP Handler. The manipulation of the argument funcpara1 results in stack-based buffer overf…
Vulnerability class: Buffer Overflow
EPSS: 0.002 (40.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Tenda W3 — versions 1.0.0.3(2204)
- Tenda W3_firmware — versions 1.0.0.3\(2204\)
Weakness classification (CWE)
References
- VDB-350407 | Tenda W3 HTTP setcfm formSetCfm stack-based overflow (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-350407 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #769172 | Tenda W3 V1.0.0.3(2204) Buffer Overflow (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-3972?
- CVE-2026-3972 is a high-severity vulnerability in Tenda W3, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-03-12.
- How severe is CVE-2026-3972?
- High severity. CVSS v3 base score is 8.8 out of 10.