Stack-Based Buffer Overflow in Tenda HG9 GPON Configuration Endpoint
CVE-2026-2907

8.7HIGH

Key Information:

Vendor

Tenda
Status
Hg9
Vendor
CVE Published:
22 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2907?

A vulnerability has been discovered in the Tenda HG9's GPON Configuration Endpoint, specifically within the file /boaform/formgponConf. This vulnerability, stemming from improper handling of user-provided arguments (specifically fmgpon_loid and fmgpon_loid_password), can lead to a stack-based buffer overflow. Such an overflow allows remote attackers to manipulate the program's execution flow, potentially leading to unauthorized access and control over the device. The exploit vector for this vulnerability is publicly available, raising significant security concerns for users of the affected firmware version.

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Affected Version(s)

HG9 300001138

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-2907 - Proof of Concept

References

https://vuldb.com/?id.347216
vdb-entrytechnical-description
https://vuldb.com/?ctiid.347216
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https://vuldb.com/?submit.755201
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LINXI666 (VulDB User)
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