CVE-2026-3976
Tenda W3 POST Parameter WifiMacFilterSet formWifiMacFilterSet stack-based overflow
Description
A weakness has been identified in Tenda W3 1.0.0.3(2204). Impacted is the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet of the component POST Parameter Handler. Executing a manipulation of the argument index/GO can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.
INFO
Published Date :
March 12, 2026, 3:15 a.m.
Last Modified :
April 2, 2026, 8:07 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update the Tenda W3 device firmware to the latest version.
- Apply vendor-provided patches for the POST Parameter Handler.
- Review input validation for the WifiMacFilterSet function.
Public PoC/Exploit Available at Github
CVE-2026-3976 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3976.
| URL | Resource |
|---|---|
| https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-go-buffer-overflow | Exploit Third Party Advisory |
| https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-index-buffer-overflow | Exploit Third Party Advisory |
| https://vuldb.com/?ctiid.350411 | Permissions Required VDB Entry |
| https://vuldb.com/?id.350411 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.769179 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.769180 | Third Party Advisory VDB Entry |
| https://www.tenda.com.cn/ | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3976 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3976
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3976 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3976 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 02, 2026
Action Type Old Value New Value Added CWE CWE-787 Added CPE Configuration AND OR *cpe:2.3:o:tenda:w3_firmware:1.0.0.3(2204):*:*:*:*:*:*:* OR cpe:2.3:h:tenda:w3:-:*:*:*:*:*:*:* Added Reference Type VulDB: https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-go-buffer-overflow Types: Exploit, Third Party Advisory Added Reference Type VulDB: https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-index-buffer-overflow Types: Exploit, Third Party Advisory Added Reference Type VulDB: https://vuldb.com/?ctiid.350411 Types: Permissions Required, VDB Entry Added Reference Type VulDB: https://vuldb.com/?id.350411 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.769179 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.769180 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://www.tenda.com.cn/ Types: Product -
New CVE Received by [email protected]
Mar. 12, 2026
Action Type Old Value New Value Added Description A weakness has been identified in Tenda W3 1.0.0.3(2204). Impacted is the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet of the component POST Parameter Handler. Executing a manipulation of the argument index/GO can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CVSS V2 (AV:N/AC:L/Au:S/C:C/I:C/A:C) Added CWE CWE-119 Added CWE CWE-121 Added Reference https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-go-buffer-overflow Added Reference https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-index-buffer-overflow Added Reference https://vuldb.com/?ctiid.350411 Added Reference https://vuldb.com/?id.350411 Added Reference https://vuldb.com/?submit.769179 Added Reference https://vuldb.com/?submit.769180 Added Reference https://www.tenda.com.cn/