Stack-Based Buffer Overflow in Belkin F9K1122 Router
CVE-2025-7089

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1122
Vendor
CVE Published:
6 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7089?

A stack-based buffer overflow vulnerability exists in the web interface of Belkin F9K1122 routers, specifically within the 'formWanTcpipSetup' function. By manipulating the 'pppUserName' argument, an attacker could potentially exploit this flaw, leading to unauthorized access or control over the device. This vulnerability can be triggered remotely, posing a significant risk to users. Despite notifications to Belkin regarding the issue, no formal response or patch has been issued, leaving the devices exposed to potential exploitation.

Affected Version(s)

F9K1122 1.00.33

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-2025-7089 - Proof of Concept

References

https://vuldb.com/?id.315005
vdb-entrytechnical-description
https://vuldb.com/?ctiid.315005
signaturepermissions-required
https://vuldb.com/?submit.603698
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

pjqwudi (VulDB User)
.
CVE-2025-7089 : Stack-Based Buffer Overflow in Belkin F9K1122 Router