CVE-2026-3768
Stack-Based Buffer Overflow in Tenda F453 Remote Exploitable
Publication date: 2026-03-08
Last updated on: 2026-03-09
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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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
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': 'CVE-2026-3768 is a critical stack-based buffer overflow vulnerability found in the Tenda F453 router, version 1.0.0.3. The flaw exists in the function formWrlExtraSet within the /goform/WrlExtraSet endpoint. It arises from improper handling of the user-supplied parameter "GO", which is copied into a stack-based buffer without length validation using the sprintf function. This lack of boundary checks allows an attacker to overflow the buffer by sending a crafted HTTP POST request with an excessively long "GO" parameter.'}, {'type': 'paragraph', 'content': 'This vulnerability can be remotely exploited without requiring local or physical access, potentially leading to denial of service (DoS) or remote code execution (RCE) on the affected device.'}] [1, 2, 3]
How can this vulnerability impact me? :
Exploitation of this vulnerability can compromise the confidentiality, integrity, and availability of the affected Tenda F453 router. An attacker can remotely execute arbitrary code or cause a denial of service (DoS) by sending specially crafted requests to the vulnerable endpoint.
- Remote code execution (RCE) allowing full control over the device.
- Denial of service (DoS) causing the device to crash or become unresponsive.
- Potential compromise of network security due to control over the router.
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 monitoring for HTTP POST requests sent to the endpoint /goform/WrlExtraSet containing an unusually long or crafted "GO" parameter. Such requests may indicate attempts to exploit the stack-based buffer overflow.'}, {'type': 'paragraph', 'content': 'A practical detection method is to capture and analyze network traffic for POST requests targeting /goform/WrlExtraSet with large or suspicious payloads in the "GO" parameter.'}, {'type': 'list_item', 'content': 'Use a network packet capture tool like tcpdump or Wireshark to filter HTTP POST requests to /goform/WrlExtraSet.'}, {'type': 'list_item', 'content': "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/WrlExtraSet'"}, {'type': 'list_item', 'content': 'Use curl or similar tools to test the endpoint by sending crafted POST requests with large "GO" parameter values to check for abnormal behavior or crashes.'}, {'type': 'list_item', 'content': 'Example curl command to test: curl -X POST http://<router-ip>/goform/WrlExtraSet -d \'GO=$(python3 -c "print(\'a\'*1000)")\''}] [1, 3]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': 'No known mitigations or countermeasures have been identified for this vulnerability.'}, {'type': 'paragraph', 'content': 'The recommended immediate step is to replace the affected Tenda F453 router (version 1.0.0.3) with an alternative product that is not vulnerable.'}, {'type': 'paragraph', 'content': "Additionally, restricting remote access to the device's management interface and monitoring for suspicious activity may help reduce exposure until replacement."}] [1]