CVE-2026-4553
Stack-Based Buffer Overflow in Tenda F453 Natlimit Component
Publication date: 2026-03-22
Last updated on: 2026-04-02
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | f453_firmware | 1.0.0.3 |
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
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': 'CVE-2026-4553 is a stack-based buffer overflow vulnerability found in the Tenda F453 router, version 1.0.0.3. It exists in the fromNatlimit function of the /goform/Natlimit endpoint, which processes a user-supplied parameter called "page."'}, {'type': 'paragraph', 'content': 'The vulnerability occurs because the "page" parameter is passed directly to the sprintf function without any bounds checking, allowing an attacker to send an excessively long "page" value that overflows the stack buffer.'}, {'type': 'paragraph', 'content': 'This overflow can be triggered remotely via a POST request, potentially leading to denial of service (DoS) or remote code execution (RCE) on the device.'}] [1]
How can this vulnerability impact me? :
Exploitation of this vulnerability can allow an attacker to cause a denial of service (DoS) by crashing the device or, more severely, to execute arbitrary code remotely on the affected Tenda F453 router.
Remote code execution could enable the attacker to take control of the device, potentially leading to unauthorized access, data interception, or further attacks within the network.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
[{'type': 'paragraph', 'content': 'This vulnerability can be detected by sending a specially crafted POST request to the /goform/Natlimit endpoint of the Tenda F453 router running version 1.0.0.3. The request should include an excessively long "page" parameter to test for a stack-based buffer overflow.'}, {'type': 'paragraph', 'content': 'A detection command example using curl would be:'}, {'type': 'list_item', 'content': 'curl -X POST http://[router_ip]/goform/Natlimit -d "page=$(python3 -c \'print("A"*1000)\')"'}, {'type': 'paragraph', 'content': 'If the device crashes, becomes unresponsive, or exhibits abnormal behavior after this request, it indicates the presence of the vulnerability.'}] [1]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': 'Immediate mitigation steps include:'}, {'type': 'list_item', 'content': "Restrict remote access to the router's management interface to trusted networks only."}, {'type': 'list_item', 'content': 'Monitor network traffic for suspicious POST requests targeting the /goform/Natlimit endpoint with unusually large "page" parameters.'}, {'type': 'list_item', 'content': 'If possible, apply any available firmware updates from Tenda that address this vulnerability.'}, {'type': 'list_item', 'content': "As a temporary measure, consider disabling or restricting access to the vulnerable service or endpoint if the router's configuration allows."}] [1]