Stack-Based Buffer Overflow in Tenda FH451 Router
CVE-2025-7793

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh451
Vendor
CVE Published:
18 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7793?

A stack-based buffer overflow vulnerability exists in the Tenda FH451 router, specifically within the formWebTypeLibrary function located in the /goform/webtypelibrary file. This flaw arises due to improper handling of the webSiteId argument, allowing remote attackers to exploit the vulnerability. Successful exploitation may lead to unintended memory manipulation, potentially compromising the device's integrity and security. Given its public disclosure, immediate attention to vulnerabilities in affected versions is crucial for safeguarding systems.

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-2025-7793 - Proof of Concept

References

https://vuldb.com/?id.316854
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316854
signaturepermissions-required
https://vuldb.com/?submit.616317
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-2025-7793 : Stack-Based Buffer Overflow in Tenda FH451 Router