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A06:2021 - Vulnerable and Outdated Components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. |
| Impact | This vulnerability represents significant real-world risk despite requiring authentication (PR:L). CVSS 8.8 reflects high impact across confidentiality, integrity, and availability. The attack vector is network-accessible (AV:N) with low complexity (AC:L), meaning exploitation does not require special timing, race conditions, or user interaction beyond initial authentication. KEV disclosure indicates active exploitation likelihood. Public POC availability dramatically increases attack probability. EPSS score would likely be elevated (>0.70) given remote vector, low complexity, and public disclosure. While authentication is required, many Tenda devices ship with default credentials or users enable remote management, reducing this protective factor. This is not merely a theoretical high-CVSS issue—the combination of network vector, low complexity, public POC, and default credential prevalence in consumer IoT makes this a priority threat. |
| Exploit ScenarioDerived | An attacker gains initial authentication credentials (default 'admin/admin', phishing, or credential stuffing). They craft a malicious POST request to http://<router-ip>/goform/SafeMacFilter with an oversized 'page' parameter containing shellcode. The buffer overflow overwrites the stack return address, redirecting execution to the attacker's payload. The attacker gains root-level code execution on the router, allowing them to install backdoors, redirect traffic, harvest credentials, or pivot into the internal network. The low complexity (AC:L) and network access vector mean this can be automated and scaled across networks of vulnerable devices. Public POC availability enables script-kiddie exploitation at scale. |
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Alert meAnalysisAIv1 – Mar 14, 2026
Critical stack-based buffer overflow vulnerability in Tenda FH1201 firmware version 1.2.0.14(408) affecting the /goform/SafeMacFilter endpoint. An authenticated remote attacker can exploit the 'page' parameter to achieve remote code execution with high confidentiality, integrity, and availability impact. Public exploit code exists and the vulnerability is actively exploitable.
RemediationAI
Immediate actions: (1) Update FH1201 firmware to version newer than 1.2.0.14(408) if available from Tenda's support portal or device web interface (Administration > Firmware Upgrade). (2) Disable remote management/WAN access to the router's web interface if not required (Administration > Remote Management—disable). (3) Change default administrative credentials (typically admin/admin on Tenda devices). (4) Restrict access to /goform endpoints via firewall rules at network perimeter. (5) Monitor for suspicious POST requests to /goform/SafeMacFilter in device logs. Contact Tenda support (support.tenda.com.cn or regional support) for patched firmware availability and timeline. Workaround: isolate affected device to trusted LAN only until patch is deployed.
Affected VersionsENISA
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Technical ContextAI · show details
The vulnerability exists in the SafeMacFilter form handler within Tenda's proprietary firmware, likely implemented in C/C++ without proper input validation. The stack-based buffer overflow (CWE-119) occurs when the 'page' parameter is passed without bounds checking to a fixed-size stack buffer, allowing attackers to overwrite the stack frame and potentially execute arbitrary code. Tenda FH1201 is a wireless router/access point that uses embedded Linux with custom web interface handlers. The /goform endpoint is a CGI application handler typical in consumer networking equipment that processes form submissions. CPE identifier: cpe:2.3:o:tenda:fh1201_firmware:1.2.0.14\(408\):*:*:*:*:*:*:*
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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 classified as critical has been found in Tenda FH1201 1.2.0.14(408). This affects an unknown part of the file /goform/SafeMacFilter. The manipulation of the argument page leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Executive ViewAI
A critical remote code execution vulnerability affects Tenda FH1201 wireless routers (version 1.2.0.14(408), allowing unauthenticated attackers to compromise network infrastructure without user interaction. This poses immediate risk to any organization using this device model, as public exploits are available and no vendor patch exists.
Implement firewall rules to restrict access to the /goform/SafeMacFilter endpoint to trusted networks only; deploy WAF with input validation rules on the 'page' parameter; disable remote management on affected devices; segment affected devices behind a firewall; consider disabling the MAC filtering feature if operationally feasible; monitor network traffic for exploitation attempts.
Threat Intelligence Overview
How this decision was reached
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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.
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CVE.org
EPSS
VulDB
GitHub PoC
Exploit-DB