CVE-2026-3976

Name: CVE-2026-3976
Creator: NVD / NIST
Published: 2026-03-12T03:15:58.74+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2026-3976 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS:4.0/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

EPSS Probability

0.64%

45.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tenda	W3 Firmware	1.0.0.3\(2204\)

References

https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-go-buffer-overflowExploit, Third Party Advisory
https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-formWifiMacFilterSet-index-buffer-overflowExploit, Third Party Advisory
https://vuldb.com/?ctiid.350411Permissions Required, VDB Entry
https://vuldb.com/?id.350411Third Party Advisory, VDB Entry
https://vuldb.com/?submit.769179Third Party Advisory, VDB Entry
https://vuldb.com/?submit.769180Third Party Advisory, VDB Entry
https://www.tenda.com.cn/Product

Timeline

Published: Mar 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3976?

How severe is CVE-2026-3976?

CVE-2026-3976 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3976?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3976?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST