DNS
CVE-2026-2186
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Tenda RX3 web interface
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ExploitPOST crafted request to /goform/SetIpMacBind
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ExecutionOverflow stack buffer via argument manipulation
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ImpactExecute arbitrary code with router 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A06:2021 - Vulnerable and Outdated Components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 RX3 firmware version 16.03.13.11 with web management interface enabled. Requires valid login credentials to access /goform/SetIpMacBind endpoint. Default configuration with authentication required. |
| 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
Stack-based buffer overflow in Tenda RX3 firmware 16.03.13.11 allows authenticated remote attackers to achieve full system compromise through improper argument handling in the SetIpMacBind function. Public exploit code exists for this vulnerability, and no patch is currently available. Affected organizations should implement network segmentation and access controls to restrict administrative functionality until remediation is possible.
Earlier versions of this analysis (1)
A vulnerability has been found in Tenda RX3 16.03.13.11. Impacted is the function fromSetIpMacBind of the file /goform/SetIpMacBind. [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 Rx3 Firmware. A vulnerability has been found in Tenda RX3 16.03.13.11. Impacted is the function fromSetIpMacBind of the file /goform/SetIpMacBind. Such manipulation of the argument list leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed to the public and may 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 has been found in Tenda RX3 16.03.13.11. Impacted is the function fromSetIpMacBind of the file /goform/SetIpMacBind. Such manipulation of the argument list leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.
Executive ViewAI
A critical vulnerability in Tenda RX3 routers (CVE-2026-2186) allows attackers to manipulate IP-MAC binding functions, potentially enabling unauthorized network access and device spoofing. Organizations using affected Tenda RX3 devices face immediate risk of network compromise, with no vendor patch currently available to remediate the threat.
Implement Web Application Firewall (WAF) rules to block POST requests to /goform/SetIpMacBind; restrict administrative access via network segmentation and VLANs; disable IP-MAC binding feature if operationally feasible; enforce strict network access controls upstream of affected devices; implement real-time monitoring for suspicious MAC/IP binding changes; consider replacing Tenda RX3 units with patched alternatives from other vendors.
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.
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