CVE-2026-7082
Remote Buffer Overflow in Tenda F456 httpd Component
Publication date: 2026-04-27
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 |
|---|---|---|
| tenda | f456_firmware | 1.0.0.5 |
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-120 | The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The CVE-2026-7082 vulnerability affects the Tenda F456 router version 1.0.0.5. It is a stack-based buffer overflow in the HTTP daemon component, specifically in the function formWrlExtraSet. This function processes a user-supplied parameter named "GO" without validating its length. The unchecked data is used in a sprintf call, which can overflow the stack-based buffer.
An attacker can exploit this by sending a specially crafted HTTP POST request to the /goform/WrlExtraSet endpoint with an excessively long "GO" parameter, causing the buffer overflow.
How can this vulnerability impact me? :
Exploiting this vulnerability can lead to denial of service (DoS) or remote code execution (RCE) on the affected device.
This means an attacker could crash the device or run arbitrary code remotely, potentially taking control of the router.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring for suspicious HTTP POST requests sent to the /goform/WrlExtraSet endpoint with an unusually long or excessively large "GO" parameter.
A practical detection method is to capture and analyze network traffic targeting the Tenda F456 router, specifically looking for POST requests to /goform/WrlExtraSet with large payloads in the "GO" parameter.
Example command using curl to test if the device is vulnerable by sending a large payload in the "GO" parameter:
- curl -X POST http://[router_ip]/goform/WrlExtraSet -d "GO=$(python3 -c 'print("A"*1000)')"
Alternatively, network intrusion detection systems (NIDS) can be configured to alert on HTTP POST requests to /goform/WrlExtraSet with unusually large "GO" parameters.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the affected device's management interface to trusted networks only, such as limiting access via firewall rules.
Avoid exposing the Tenda F456 router's HTTP management interface to the internet or untrusted networks.
Monitor and block suspicious HTTP POST requests to the /goform/WrlExtraSet endpoint, especially those with large "GO" parameter values.
If possible, update the device firmware to a version that patches this vulnerability once it becomes available from the vendor.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how the CVE-2026-7082 vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.