How serious is CVE-2026-4042?

This vulnerability has a CVSS score of 7.4 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-4042?

Yes, proof-of-concept exploit code for CVE-2026-4042 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-4042?

Check the official CVE details for a complete list of affected products and versions.

How do I fix CVE-2026-4042?

To remediate CVE-2026-4042, check for security patches from the vendor. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-4042

High

|7.4

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to remotely execute malicious code on the Tenda i12 router by exploiting a flaw in how it handles certain input, potentially taking control of the device. The attacker needs to send a specially crafted request to the router, and since the exploit is publicly available, it poses a significant risk to users.

Technical Description

A weakness has been identified in Tenda i12 1.0.0.6(2204). The affected element is the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. This manipulation of the argument index causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

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

Exploit Resources

Search for proof-of-concept code and exploit modules

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Official References

NIST NVD

Est. Bounty

$1,842($1K-$5K)

Vendor Response

Grade APatched in 0 days

Quick Information

Published

Mar 12, 2026

26 days ago

Last Modified

Mar 12, 2026

26 days ago