Which versions of Tenda are affected by CVE-2026-4042?

A high-severity vulnerability (CVSS 8.8) has been identified in Tenda i12 wireless devices that could allow attackers to exploit the MAC filtering function, potentially compromising network access…

How to fix or mitigate CVE-2026-4042?

Within 24 hours: Inventory all Tenda i12 devices running version 1.0.0.6(2204) and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict access to affected devices, monitor for suspicious MAC filtering bypass attempts, and contact Tenda for patch availability status. Within 30 days: Develop a remediation plan including device replacement, firmware updates upon availability, or permanent decommissioning of affected units.

Tenda CVE-2026-4042

Q: What is the CVSS score of CVE-2026-4042?

CVE-2026-4042 has a CVSS 4.0 base score of 7.4 (High). CVSS 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. EPSS exploitation probability: 0.0%.

HIGH

Buffer Overflow (CWE-119)

2026-03-12 cna@vuldb.com

Buffer Overflow Tenda

7.4

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 19:57 vuln.today

CVE Published

Mar 12, 2026 - 15:16 nvd

HIGH 7.4

DescriptionCVE.org

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.

AnalysisAI

Remote code execution in Tenda i12 firmware version 1.0.0.6(2204) via stack-based buffer overflow in the WifiMacFilterGet function allows authenticated attackers to achieve full system compromise. Public exploit code exists for this vulnerability, increasing risk of active exploitation. No patch is currently available.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). 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.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.