Vulnerability · Published Mar 12, 2026 · Assigned by VulDB
CVE-2026-3972Tenda W3 HTTP setcfm formSetCfm stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in W3 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 46.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 overflow. The attack can only be performed from the local network. The exploit has been made public and could be used.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-350407 | Tenda W3 HTTP setcfm formSetCfm stack-based overflow vdb-entry, technical-description
- VDB-350407 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #769172 | Tenda W3 V1.0.0.3(2204) Buffer Overflow third-party-advisory
- https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-setcfm-funcpara1-buffer-overflow exploit
- https://www.tenda.com.cn/ product