CVE-2026-5613
Stack-Based Buffer Overflow in Belkin F9K1015 Remote Reboot Function
Publication date: 2026-04-06
Last updated on: 2026-04-30
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| belkin | f9k1015_firmware | 1.00.10 |
Helpful Resources
Exploitability
| 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). |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
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.
What immediate steps should I take to mitigate this vulnerability?
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.