CVE-2026-3769
Remote Stack-Based Buffer Overflow in Tenda F453 WrlclientSet
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-2026-3769 is a stack-based buffer overflow vulnerability found in the Tenda F453 router, version 1.0.0.3. It exists in the WrlclientSet function of the /goform/WrlclientSet endpoint. The vulnerability arises because the user-supplied parameter "GO" is assigned to a variable and passed to a function that uses sprintf without any length validation or bounds checking. This allows an attacker to overflow the stack buffer by sending a specially crafted HTTP POST request with an excessively long "GO" parameter.'}, {'type': 'paragraph', 'content': 'Exploiting this vulnerability can lead to denial of service or remote code execution on the affected device.'}] [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can have severe impacts including causing a denial of service or allowing an attacker to execute arbitrary code remotely on the affected Tenda F453 router. Because the exploit can be executed remotely without local access or physical interaction, it poses a high risk to device confidentiality, integrity, and availability.
Successful exploitation could compromise the router, potentially allowing attackers to control network traffic, intercept data, or disrupt network services.
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 suspicious HTTP POST requests sent to the /goform/WrlclientSet endpoint containing an excessively long or malformed "GO" parameter.'}, {'type': 'paragraph', 'content': 'A practical detection method is to capture and analyze network traffic for such requests, which may indicate exploitation attempts.'}, {'type': 'paragraph', 'content': 'For example, using command-line tools like curl or netcat, you can attempt to send a crafted POST request with a large payload in the "GO" parameter to test if the device is vulnerable.'}, {'type': 'list_item', 'content': 'curl -X POST http://<router-ip>/goform/WrlclientSet -d "GO=$(python3 -c \'print("A"*1000)\')"'}, {'type': 'list_item', 'content': "tcpdump -i <interface> -A 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)'"}, {'type': 'paragraph', 'content': 'These commands help in either testing the vulnerability or capturing suspicious exploit attempts on the network.'}] [1, 3]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include avoiding exposure of the vulnerable device to untrusted networks and disabling remote management features if possible.
Since no known software patches or mitigations are currently available, it is recommended to replace the affected Tenda F453 router running firmware version 1.0.0.3 with a more secure alternative.
Additionally, monitoring network traffic for exploit attempts and restricting access to the /goform/WrlclientSet endpoint can help reduce risk.