Stack-Based Buffer Overflow in Belkin F9K1122 Router Web Interface
CVE-2025-7086

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1122
Vendor
CVE Published:
6 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7086?

A stack-based buffer overflow vulnerability exists in the PPTP setup functionality of Belkin's F9K1122 router, specifically affecting version 1.00.33. The exploit occurs when manipulating the 'pptpUserName' argument within the '/goform/formPPTPSetup' file. This flaw allows remote attackers to execute arbitrary code, potentially compromising the router's security. Public disclosure has occurred, and although the vendor was notified, no response has been recorded regarding remediation.

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-2025-7086 - Proof of Concept

References

https://vuldb.com/?id.315000
vdb-entrytechnical-description
https://vuldb.com/?ctiid.315000
signaturepermissions-required
https://vuldb.com/?submit.603695
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-2025-7086 : Stack-Based Buffer Overflow in Belkin F9K1122 Router Web Interface