CVE-2026-3811
Remote Stack-Based Buffer Overflow in Tenda FH1202 P2pListFilter
Publication date: 2026-03-09
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 | fh1202_firmware | 1.2.0.14(408) |
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-2026-3811 is a stack-based buffer overflow vulnerability found in the Tenda FH1202 router firmware version 1.2.0.14(408). It occurs in the fromP2pListFilter function of the /goform/P2pListFilter endpoint, where a user-supplied "page" parameter is processed using the unsafe sprintf function without length checks. This allows an attacker to send a specially crafted POST request with an excessively long "page" parameter, causing the stack buffer to overflow.'}, {'type': 'paragraph', 'content': 'This overflow can lead to denial of service (DoS) or enable remote code execution (RCE) on the device, allowing an attacker to potentially take control of the router remotely.'}] [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can have severe impacts including denial of service (DoS), which can disrupt network connectivity by crashing the router.
More critically, it can allow remote code execution (RCE), enabling an attacker to execute arbitrary code on the affected device remotely without any user interaction or physical access.
Such exploitation can compromise the confidentiality, integrity, and availability of the device and the network it supports, potentially leading to unauthorized access, data theft, or further network attacks.
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 monitoring for suspicious POST requests sent to the /goform/P2pListFilter endpoint containing an excessively long "page" 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 HTTP traffic targeting the affected router, looking specifically for POST requests with unusually large "page" parameter values.'}, {'type': 'list_item', 'content': 'Use network packet capture tools like tcpdump or Wireshark to filter HTTP POST requests to /goform/P2pListFilter.'}, {'type': 'list_item', 'content': "Example tcpdump command to capture relevant traffic: tcpdump -i <interface> -A 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' | grep -i 'POST /goform/P2pListFilter'"}, {'type': 'list_item', 'content': 'Inspect captured HTTP POST data for the "page" parameter with abnormally long values, which may be repeated characters or unusually large strings.'}] [1, 3]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': "Immediate mitigation steps include restricting access to the affected device's management interface to trusted networks only, such as internal LAN segments, to reduce exposure to remote attacks."}, {'type': 'paragraph', 'content': 'Since no patches or fixes are currently available, it is recommended to replace the affected Tenda FH1202 router with a different device that is not vulnerable.'}, {'type': 'paragraph', 'content': 'Additionally, monitoring network traffic for exploit attempts and disabling remote management features can help reduce the risk.'}] [2]