Stack-based Buffer Overflow in Belkin F9K1015 Router
CVE-2026-5610

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1015
Vendor
CVE Published:
6 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5610?

A stack-based buffer overflow vulnerability has been identified in the Belkin F9K1015 router, specifically in the function formWISP5G located in the /goform/formWISP5G file. This issue arises from improper handling of input parameters, allowing attackers to manipulate the argument webpage. As a result, an attacker can execute a remote exploit to gain unauthorized access or control over the affected device. Despite early disclosure to the vendor, there has been no response or mitigation provided to address this critical security flaw.

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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-2026-5610 - Proof of Concept

References

https://vuldb.com/vuln/355401
vdb-entrytechnical-description
https://vuldb.com/vuln/355401/cti
signaturepermissions-required
https://vuldb.com/submit/785537
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

LtzHust (VulDB User)
VulDB CNA Team
JSON
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