F451 Firmware
CVE-2026-3679
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Tenda FH451 web interface
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DeliverySend crafted request to /goform/QuickIndex
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ExploitInject oversized mit_linktype or PPPOEPassword parameter
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ExecutionTrigger stack 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A06:2021 - Vulnerable and Outdated Components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 FH451 firmware version 1.0.0.9 with web management interface enabled. Attacker requires valid login credentials to access /goform/QuickIndex endpoint. The formQuickIndex function processes mit_linktype and PPPOEPassword parameters without bounds checking. |
| 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 FH451 firmware via stack-based buffer overflow in the QuickIndex function allows unauthenticated attackers to execute arbitrary code by sending crafted requests with oversized PPPOEPassword parameters. Public exploit code exists for this vulnerability, and no patch is currently available. The attack requires network access and affects firmware version 1.0.0.9 and potentially other versions.
Earlier versions of this analysis (1)
A vulnerability was identified in Tenda FH451 1.0.0.9. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex. [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 F451 Firmware. A vulnerability was identified in Tenda FH451 1.0.0.9. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex. Such manipulation of the argument mit_linktype/PPPOEPassword leads to stack-based buffer overflow. It is possible to launch 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 FH451 1.0.0.9. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex. Such manipulation of the argument mit_linktype/PPPOEPassword leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used.
Executive ViewAI
A high-severity vulnerability (CVSS 8.8) in Tenda FH451 routers lacks available patches and has active public exploits, creating immediate risk for organizations using this device. Affected users face potential unauthorized access, data interception, and network compromise, requiring urgent mitigation actions to prevent exploitation.
Implement network segmentation to isolate affected devices from critical assets. Deploy Web Application Firewall (WAF) rules blocking requests to /goform/QuickIndex endpoint with suspicious parameters. Disable remote management and UPnP features if not required. Restrict administrative access to the device using IP whitelisting. Monitor for exploitation attempts via network-based intrusion detection. Implement VPN enforcement for any necessary remote access to network segments containing these devices.
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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Exploit-DB