Buffer overflow in Tenda W3
CVE-2026-4008
A flaw has been found in Tenda W3 1.0.0.3(2204). This issue affects some unknown processing of the file /goform/wifiSSIDset of the component POST Parameter Handler. Executing a manipulation of the argument index/GO can lead to stack-based…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (29.3th 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-350531 | Tenda W3 POST Parameter wifiSSIDset stack-based overflow (vdb-entry, technical-description)
- VDB-350531 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #769182 | Tenda W3 V1.0.0.3(2204) Buffer Overflow (third-party-advisory)
- Submit #769183 | Tenda W3 V1.0.0.3(2204) Buffer Overflow (Duplicate) (third-party-advisory)
- github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formwrlSSIDset-index-buffer-ove… (related)
- github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formwrlSSIDset-go-buffer-overfl… (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-4008?
- CVE-2026-4008 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-2026-4008?
- High severity. CVSS v3 base score is 8.8 out of 10.