CVE-2026-3976
HIGHCVSS Vector
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
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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.
Analysis
Stack-based buffer overflow in Tenda W3 firmware version 1.0.0.3(2204) allows remote authenticated attackers to achieve complete system compromise through manipulation of the index/GO parameter in the /goform/WifiMacFilterSet POST handler. Public exploit code is available for this vulnerability, increasing the risk of active exploitation. …
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Remediation
Within 24 hours: Inventory all Tenda W3 1.0.0.3(2204) devices in production and assess network exposure. Within 7 days: Implement network segmentation to restrict administrative access to affected devices, disable MAC filtering if operationally feasible, and monitor for suspicious configuration changes. …
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