Stack-Based Buffer Overflow in Tenda FH451 Router
CVE-2025-7854

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
19 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7854?

A stack-based buffer overflow vulnerability affects the Tenda FH451 router, specifically within the VirtualSer function located in the /goform/VirtualSer file. This vulnerability arises when improper validation of the 'page' argument is present, allowing attackers to exploit it remotely. The exploit has been publicly disclosed, making systems running the affected version susceptible to unauthorized access and manipulation.

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-2025-7854 - Proof of Concept

References

https://vuldb.com/?id.316944
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316944
signaturepermissions-required
https://vuldb.com/?submit.616366
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)
.
CVE-2025-7854 : Stack-Based Buffer Overflow in Tenda FH451 Router