Stack-Based Buffer Overflow in Belkin F9K1122 Router
CVE-2026-4167

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1122
Vendor
CVE Published:
15 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4167?

A significant vulnerability has been identified in the Belkin F9K1122 router, specifically related to the 'formReboot' function in the /goform/formReboot file. This security flaw can be exploited by manipulating the argument 'webpage,' leading to a stack-based buffer overflow. Attackers may initiate this exploit remotely, posing a severe risk to network integrity. Despite early notifications provided to the vendor about this security issue, they have not responded, leaving users and systems vulnerable to potential attacks.

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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-2026-4167 - Proof of Concept

References

https://vuldb.com/?id.351074
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351074
signaturepermissions-required
https://vuldb.com/?submit.769727
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

LtzHust2 (VulDB User)
VulDB
JSON
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