Stack-Based Buffer Overflow in Belkin F9K1122 Router
CVE-2026-5043

8.7HIGH

Key Information:

Vendor

Belkin

Status
F9k1122
Vendor
CVE Published:
29 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5043?

A vulnerability has been detected in the Belkin F9K1122 Router, specifically in the function 'formSetPassword' within the '/goform/formSetPassword' file of the Parameter Handler component. This flaw allows for stack-based buffer overflow due to improper handling of the 'webpage' argument. Attackers could potentially exploit this vulnerability remotely, as public exploits have been released. Despite attempts to notify the vendor about this issue, no response has been received, raising concerns about the security of the device.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

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-2026-5043 - Proof of Concept

References

https://vuldb.com/vuln/353966
vdb-entrytechnical-description
https://vuldb.com/vuln/353966/cti
signaturepermissions-required
https://vuldb.com/submit/779124
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

LtzHuster2 (VulDB User)
VulDB
JSON
.