Buffer Overflow Vulnerability in Tenda FH451 Router
CVE-2025-7796

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
18 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7796?

A buffer overflow vulnerability exists in the Tenda FH451 router, specifically within the fromPptpUserAdd function of the /goform/PPTPDClient file. This flaw occurs when the Username argument is improperly validated, allowing attackers to exploit the vulnerability remotely. A successful attack can lead to unauthorized access and potential system compromise, making it critical for users to secure their devices and apply any necessary patches.

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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-2025-7796 - Proof of Concept

References

https://vuldb.com/?id.316857
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316857
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https://vuldb.com/?submit.616345
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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