Hg9 Firmware
CVE-2026-2907
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Tenda HG9 web interface
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ExploitSend crafted GPON configuration request
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ExecutionOverflow fmgpon_loid parameter in /boaform/formgponConf
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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A06:2021 - Vulnerable and Outdated Components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 HG9 (300001138) with GPON Configuration Endpoint enabled; attacker must possess valid login credentials to access /boaform/formgponConf; vulnerability exploitable via authenticated remote access to web management interface. |
| 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 vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in Tenda HG9 firmware via stack buffer overflow in the GPON configuration endpoint allows authenticated attackers to achieve full system compromise through manipulation of LOID parameters. Public exploit code exists for this vulnerability, increasing the risk of active exploitation in deployed devices. No patch is currently available, making network segmentation and access controls critical for mitigation.
Earlier versions of this analysis (1)
A weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf of the component GPON Configuration Endpoint. [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 Hg9 Firmware. A weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf of the component GPON Configuration Endpoint. This manipulation of the argument fmgpon_loid/fmgpon_loid_password causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could 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 weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf of the component GPON Configuration Endpoint. This manipulation of the argument fmgpon_loid/fmgpon_loid_password causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.
Executive ViewAI
A high-severity vulnerability (CVSS 8.8) in Tenda HG9 devices allows unauthenticated attackers to exploit the GPON configuration endpoint, potentially compromising network infrastructure and customer connectivity. Organizations using this equipment face immediate risk of unauthorized access, data interception, and service disruption, with active public exploits currently available.
- Implement network segmentation isolating GPON configuration interfaces to management VLANs only. 2) Deploy WAF or IDS/IPS rules blocking unauthorized access to /boaform/formgponConf endpoint. 3) Restrict administrative access via firewall rules to known IP ranges. 4) Disable remote management features on affected devices if operationally possible. 5) Monitor logs for exploitation attempts and unauthorized configuration changes. 6) Escalate vendor engagement for emergency patch development timeline.
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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