Stack-Based Buffer Overflow in Tenda FH451 Router
CVE-2025-7855

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
19 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7855?

A stack-based buffer overflow vulnerability has been discovered in the Tenda FH451 router version 1.0.0.9, specifically in the 'fromqossetting' function located in the '/goform/qossetting' file. This flaw allows attackers to manipulate the 'page' argument, potentially leading to unauthorized remote code execution. Exploiters can trigger this vulnerability from an external network, emphasizing the need for immediate attention to device security and timely updates.

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Affected Version(s)

FH451 1.0.0.9

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-2025-7855 - Proof of Concept

References

https://vuldb.com/?id.316945
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316945
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https://vuldb.com/?submit.616367
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

panda_0x1 (VulDB User)
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