Buffer Overflow Vulnerability in Tenda W3 by Tenda
CVE-2026-3972

8.7HIGH

Key Information:

Vendor

Tenda
Status
W3
Vendor
CVE Published:
12 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3972?

A buffer overflow vulnerability exists in the Tenda W3 device in the formSetCfm function of the HTTP Handler component. This flaw allows an attacker on the same local network to manipulate the funcpara1 argument, potentially leading to unauthorized access or control. The exploit has been publicly disclosed, increasing the urgency for administrators to apply necessary security measures.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

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-2026-3972 - Proof of Concept

References

https://vuldb.com/?id.350407
vdb-entrytechnical-description
https://vuldb.com/?ctiid.350407
signaturepermissions-required
https://vuldb.com/?submit.769172
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent 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)
JSON
.