I3 Firmware
CVE-2026-3803
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 request to /goform/WifiMacFilterGet
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ExploitManipulate index parameter
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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A06:2021 - Vulnerable and Outdated Components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 formWifiMacFilterGet function accessible via /goform/WifiMacFilterGet endpoint. Attacker requires valid login credentials (PR:L) to access the vulnerable 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 firmware versions up to 1.0.0.6(2204) via stack-based buffer overflow in the WiFi MAC filter function allows unauthenticated attackers to achieve full system compromise over the network. Public exploit code exists for this vulnerability and no patch is currently available. The flaw requires only low complexity to exploit and affects the confidentiality, integrity, and availability of affected devices.
Earlier versions of this analysis (1)
A vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. [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 vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. The manipulation of the argument index leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
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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 vulnerability was identified in Tenda i3 1.0.0.6(2204). This affects the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. The manipulation of the argument index leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
Executive ViewAI
A high-severity vulnerability (CVSS 8.8) affects Tenda i3 wireless routers, potentially allowing unauthorized access to network configuration and device control. Organizations using this equipment face immediate risk of network compromise, data interception, and unauthorized administrative access, particularly concerning given the public availability of exploit code.
Restrict network access to the /goform/WifiMacFilterGet endpoint using firewall rules and network segmentation; disable remote management features if not required; implement Web Application Firewall (WAF) rules to monitor and block suspicious requests to /goform/ endpoints; enforce strong authentication and change default credentials; monitor device logs for exploitation attempts; consider isolating affected devices to a separate management VLAN with restricted access.
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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