CVE-2026-3973
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 vulnerability was determined in Tenda W3 1.0.0.3(2204). This affects the function formSetAutoPing of the file /goform/setAutoPing of the component POST Parameter Handler. This manipulation of the argument ping1/ping2 causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.
Analysis
Stack-based buffer overflow in Tenda W3 firmware version 1.0.0.3(2204) allows authenticated remote attackers to achieve complete system compromise through malicious ping parameters sent to the /goform/setAutoPing endpoint. Public exploit code is available for this vulnerability, increasing the risk of active exploitation. …
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Remediation
Within 24 hours: Audit all Tenda W3 1.0.0.3 deployments in your environment and isolate affected devices to restricted networks if possible. Within 7 days: Implement network segmentation to limit device administrative access, disable the auto-ping feature if operationally feasible, and deploy WAF/IDS signatures to block exploitation attempts targeting /goform/setAutoPing. …
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