Remote Stack-Based Buffer Overflow in Tenda W3 by Tenda
CVE-2026-3975

8.7HIGH

Key Information:

Vendor

Tenda
Status
W3
Vendor
CVE Published:
12 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3975?

A security flaw exists in the Tenda W3 version 1.0.0.3(2204), specifically within the formWifiMacFilterGet function of the POST Parameter Handler. When manipulated by exploiting the wl_radio argument, this vulnerability can lead to a stack-based buffer overflow. This issue allows an attacker to execute a remote exploitation, making it critical for users to apply safeguards against potential threats. The exploit details are publicly available, increasing the urgency for prompt remediation.

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Affected Version(s)

W3 1.0.0.3(2204)

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3975 - Proof of Concept

References

https://vuldb.com/?id.350410
vdb-entrytechnical-description
https://vuldb.com/?ctiid.350410
signaturepermissions-required
https://vuldb.com/?submit.769178
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Svigo_o (VulDB User)
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