Stack-Based Buffer Overflow Vulnerability in Belkin F9K1015 Router
CVE-2026-5613

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1015
Vendor
CVE Published:
6 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5613?

A stack-based buffer overflow has been discovered in the Belkin F9K1015 router, specifically affecting the formReboot function located in the /goform/formReboot file. This vulnerability arises from improper handling of the 'webpage' argument, allowing attackers to exploit this weakness remotely. Publicly available exploit code further increases the risk associated with this vulnerability. Despite early notification to the vendor, no response has been received regarding this serious security concern.

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-2026-5613 - Proof of Concept

References

https://vuldb.com/vuln/355404
vdb-entrytechnical-description
https://vuldb.com/vuln/355404/cti
signaturepermissions-required
https://vuldb.com/submit/785552
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
.