CVE-2026-3973

Tenda W3 Firmware buffer overflow

8.8 HIGHPublic exploitEPSS 1.05%

Published12 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Tenda W3 Firmware1.0.0.3\(2204\)

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-setautoping-ping1-buffer-overflowExploitThird Party Advisory
https://github.com/Svigo-o/Tenda_vul/tree/main/tenda-w3-setautoping-ping2-buffer-overflowExploitThird Party Advisory
https://vuldb.com/?ctiid.350408Permissions RequiredVDB Entry
https://vuldb.com/?id.350408Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769173Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769176Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/Product

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-3973 being actively exploited?

CVE-2026-3973 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.05%.

How severe is CVE-2026-3973?

CVE-2026-3973 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 1.05% probability of exploitation.

Which products are affected by CVE-2026-3973?

Affected products include Tenda W3 Firmware.

How do I fix CVE-2026-3973?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-3973 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.