CVE-2026-5613
Received Received - Intake
Stack-Based Buffer Overflow in Belkin F9K1015 Remote Reboot Function

Publication date: 2026-04-06

Last updated on: 2026-04-30

Assigner: VulDB

Description
A vulnerability was identified in Belkin F9K1015 1.00.10. This issue affects the function formReboot of the file /goform/formReboot. The manipulation of the argument webpage leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Meta Information
Published
2026-04-06
Last Modified
2026-04-30
Generated
2026-06-16
AI Q&A
2026-04-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-5613
EUVD
EUVD-2026-19154
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
belkin f9k1015_firmware 1.00.10
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

The Belkin F9K1015 router, version 1.00.10, contains a stack-based buffer overflow vulnerability in its firmware, specifically within the web interface's formReboot function.

This vulnerability arises because the function reads a user-supplied parameter named "webpage" and subsequently passes the variable p_ok_msg to the strcpy function without performing any length checks.

This lack of validation allows the p_ok_msg data to overflow the fixed-size buffer ok_msg on the stack.

Exploitation can be achieved by sending a specially crafted HTTP POST request to the endpoint /goform/formReboot with an excessively long "webpage" parameter, which triggers the overflow.

Impact Analysis

The consequences of this buffer overflow include the potential for remote code execution or denial of service (DoS) attacks.

An attacker can overwrite the stack and manipulate the program's control flow, which may allow them to execute arbitrary code remotely.

Detection Guidance

This vulnerability can be detected by monitoring for HTTP POST requests sent to the endpoint /goform/formReboot containing an unusually long or malformed "webpage" parameter.

A practical detection method is to capture and analyze network traffic to identify such suspicious POST requests.

  • Use a network packet capture tool like tcpdump or Wireshark to filter HTTP POST requests to /goform/formReboot.
  • Example tcpdump command: tcpdump -i <interface> -A 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' | grep -i 'POST /goform/formReboot'
  • Inspect the captured POST data for the "webpage" parameter with an abnormally large payload.
Mitigation Strategies

Immediate mitigation steps include restricting access to the vulnerable device's web interface to trusted networks only.

Disable remote management features if enabled, to prevent remote exploitation.

Monitor network traffic for suspicious POST requests targeting /goform/formReboot and block such traffic using firewall rules.

If possible, update the firmware to a patched version once available, or consider replacing the device if no patch is provided.

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