Stack-Based Buffer Overflow in Belkin F9K1015 Router
CVE-2026-5629

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1015
Vendor
CVE Published:
6 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5629?

A stack-based buffer overflow vulnerability exists in the formSetFirewall function of Belkin's F9K1015 router firmware version 1.00.10. An attacker can exploit this vulnerability remotely by manipulating the argument used in the webpage, leading to potential unauthorized access and control over the device. Despite early disclosures, the vendor has not yet responded to this critical alert, and the exploit remains public. Users are advised to implement necessary security measures and monitor for any unusual activity related to their devices.

Affected Version(s)

F9K1015 1.00.10

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-2026-5629 - Proof of Concept

References

https://vuldb.com/vuln/355417
vdb-entrytechnical-description
https://vuldb.com/vuln/355417/cti
signaturepermissions-required
https://vuldb.com/submit/785556
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

LtzHuster (VulDB User)
VulDB CNA Team
.