Stack-based Buffer Overflow in Tenda FH451 Router HTTP POST Handler
CVE-2025-7505

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
12 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7505?

A stack-based buffer overflow vulnerability has been identified in the Tenda FH451 router, specifically within the HTTP POST Request Handler's frmL7ProtForm function located in the /goform/L7Prot file. The vulnerability arises from improper handling of the 'page' argument, which allows remote attackers to exploit the flaw and potentially execute arbitrary code. Since the exploit has already been disclosed publicly, it poses a significant risk to users operating the affected version. Prompt action to implement security measures is recommended.

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-2025-7505 - Proof of Concept

References

https://vuldb.com/?id.316188
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316188
signaturepermissions-required
https://vuldb.com/?submit.611504
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)
.
CVE-2025-7505 : Stack-based Buffer Overflow in Tenda FH451 Router HTTP POST Handler