Stack-Based Buffer Overflow in Tenda FH451 by Tenda
CVE-2025-7506

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
12 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7506?

A stack-based buffer overflow vulnerability has been identified in the Tenda FH451 router, specifically in the 'fromNatlimit' function located in the HTTP POST Request Handler. This vulnerability arises when the argument 'page' is manipulated, which can allow remote attackers to execute arbitrary code or disrupt device functionality. Due to its nature, this flaw poses a significant risk as it can be exploited from a distance, making it crucial for users to update to a secure version to mitigate potential threats.

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-2025-7506 - Proof of Concept

References

https://vuldb.com/?id.316189
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316189
signaturepermissions-required
https://vuldb.com/?submit.611505
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

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