Buffer overflow in Tenda W3
CVE-2026-3975
A security flaw has been discovered in Tenda W3 1.0.0.3(2204). This issue affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet of the component POST Parameter Handler. Performing a manipulation of the argument wl_radio results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (61.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.010 · change: +0.004
Affected products
- Tenda W3 — versions 1.0.0.3(2204)
- Tenda W3 Firmware — versions 1.0.0.3\(2204\), 1.0.0.3(2204)
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterGet-index-buff… (Exploit, Third Party Advisory, exploit)
- www.tenda.com.cn/ (Product, product)
Frequently asked questions
- What is CVE-2026-3975?
- CVE-2026-3975 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-2026-3975?
- High severity. CVSS v3 base score is 8.8 out of 10.