Stack-Based Buffer Overflow in Tenda HG9 Loopback Detection Configuration Endpoint
CVE-2026-2908

8.7HIGH

Key Information:

Vendor

Tenda
Status
Hg9
Vendor
CVE Published:
22 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2908?

A security vulnerability has been identified in the Tenda HG9 300001138, specifically within the Loopback Detection Configuration Endpoint. The issue arises from inadequate handling of the Ethtype argument in the file /boaform/formLoopBack, leading to a stack-based buffer overflow. This flaw allows an attacker to manipulate the argument remotely, potentially resulting in unauthorized access or service disruption. Exploitation of this vulnerability has been publicly disclosed, emphasizing the need for immediate awareness and mitigation strategies.

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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-2026-2908 - Proof of Concept

References

https://vuldb.com/?id.347217
vdb-entrytechnical-description
https://vuldb.com/?ctiid.347217
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https://vuldb.com/?submit.755202
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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