A security vulnerability has been detected in Belkin F9K1015 1
Description
A security vulnerability has been detected in Belkin F9K1015 1
AI Analyst Comment
Remediation
Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs.
Description Summary:
The Belkin F9K1015 router contains a stack-based buffer overflow vulnerability in the /goform/formWpsStart endpoint that allows remote attackers to execute arbitrary code via the pinCode parameter.
Executive Summary:
A critical stack-based buffer overflow in the Belkin F9K1015 router allows authenticated remote attackers to achieve arbitrary code execution and system compromise.
Vulnerability Details
CVE-ID: CVE-2025-11302
Affected Software: Belkin F9K1015
Affected Versions: 1.00.10
Vulnerability: The vulnerability exists within the formWpsStart function, which fails to perform bounds checking on the pinCode parameter provided via a POST request. By sending an overly long input to the /goform/formWpsStart endpoint, an authenticated attacker can overflow the stack-based buffer and potentially hijack the execution flow of the device.
Business Impact
Successful exploitation of this vulnerability allows for remote code execution, which can lead to complete device takeover. This presents a high risk of unauthorized access to the local network, potential interception of traffic, and the use of the device as a pivot point for further attacks on connected systems. Given the CVSS score of 8.8, this flaw represents a significant threat to infrastructure integrity.
Remediation Plan
Immediate Action: As no official patch is currently available from the vendor, administrators should restrict access to the web management interface and disable the WPS feature if it is not strictly required.
Proactive Monitoring: Review device access logs for unusual POST requests directed at the /goform/formWpsStart endpoint and monitor for unexpected device reboots or instability.
Compensating Controls: Implement strict network segmentation to isolate the affected router from critical assets and utilize a Web Application Firewall (WAF) or firewall rules to block unauthorized access to the administrative interface.
Exploitation Status
Public Exploit Available: Yes, a proof-of-concept exists as documented in the technical write-up published on GitHub.
Analyst Notes: As of October 6, 2025, there is no confirmed active exploitation in the wild; however, per CISA's SSVC assessment a proof-of-concept exists, so exploitation risk should be treated as credible. The vulnerability is inherently dangerous due to the lack of bounds checking in a critical memory-handling function.
Analyst Recommendation
Given the availability of a public proof-of-concept and the lack of a vendor-supplied patch, this vulnerability poses an elevated risk to Belkin F9K1015 deployments. Organizations should prioritize isolating these devices from the public internet and restricting management access to trusted internal subnets until a firmware update is released.