Stack-based Buffer Overflow in Tenda FH451 Router
CVE-2025-7434

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
11 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7434?

A stack-based buffer overflow vulnerability exists in the Tenda FH451 router, specifically in the function 'fromAddressNat' within the POST Request Handler component. This weakness allows for remote manipulation of the 'page' argument, which can be exploited by an attacker to execute malicious code. The vulnerability affects versions of the Tenda FH451 router up to 1.0.0.9 and poses a significant security risk. Attackers can exploit this flaw to gain unauthorized access to the device, potentially leading to further compromise of connected systems.

Affected Version(s)

FH451 1.0.0.0

FH451 1.0.0.1

FH451 1.0.0.2

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-2025-7434 - Proof of Concept

References

https://vuldb.com/?id.316004
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316004
signaturepermissions-required
https://vuldb.com/?submit.609058
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

zezhifu (VulDB User)
.