I3 Firmware
CVE-2026-3804
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Tenda i3 web interface
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DeliverySend crafted POST request to /goform/WifiMacFilterSet
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ExploitManipulate index parameter with oversized payload
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ExecutionTrigger stack-based buffer overflow
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ImpactExecute arbitrary code with device privileges
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Tenda i3 firmware version 1.0.0.6(2204) with web management interface enabled; attacker requires valid login credentials to access /goform/WifiMacFilterSet endpoint |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. Public exploit/POC available. |
| Exploit ScenarioDerived | A remote attacker could exploit this flaw, stack-based buffer overflow. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in Tenda i3 1.0.0.6(2204) firmware allows unauthenticated attackers to achieve full system compromise through a stack-based buffer overflow in the WifiMacFilterSet function. Public exploit code exists for this vulnerability, increasing the risk of active exploitation. No patch is currently available, requiring immediate mitigation through network segmentation or device isolation.
Earlier versions of this analysis (1)
A security flaw has been discovered in Tenda i3 1.0.0.6(2204). This vulnerability affects the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet. [CVSS 8.8 HIGH]
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.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-119 (Buffer Overflow). Affects I3 Firmware. A security flaw has been discovered in Tenda i3 1.0.0.6(2204). This vulnerability affects the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet. The manipulation of the argument index results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
A security flaw has been discovered in Tenda i3 1.0.0.6(2204). This vulnerability affects the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet. The manipulation of the argument index results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Executive ViewAI
A high-severity vulnerability (CVSS 8.8) exists in Tenda i3 wireless devices that could allow unauthorized attackers to bypass MAC filtering controls, potentially enabling unauthorized network access. Organizations relying on these devices for network security are at immediate risk, particularly if devices are internet-exposed or accessible to untrusted networks.
Implement network segmentation to isolate affected Tenda devices from critical assets; deploy WAF/IDS rules to monitor and block exploitation attempts against /goform/WifiMacFilterSet endpoint; disable MAC filtering feature if operationally feasible and enforce access controls at network layer instead; restrict administrative access to device management interfaces using IP whitelisting; consider deploying these devices behind a VPN concentrator or management network with additional authentication.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.
Affected Products (CPE)CVE.org
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