CVE-2026-7029
Buffer Overflow in Tenda F456 /goform/addressNat Allows Remote Attack
Publication date: 2026-04-26
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?
CVE-2026-7029 is a stack-based buffer overflow vulnerability in the Tenda F456 router version 1.0.0.5. It exists in the function fromAddressNat, which processes a user-supplied parameter called mitInterface. The vulnerability occurs because the input is passed to the sprintf function without any bounds checking, allowing an attacker to overflow the stack buffer.
An attacker can exploit this by sending a specially crafted HTTP POST request to the /goform/addressNat endpoint with an excessively long mitInterface parameter. This can cause the router to crash or allow the attacker to execute arbitrary code remotely.
How can this vulnerability impact me? :
This vulnerability can have serious impacts including denial of service (DoS) and remote code execution (RCE) on the affected Tenda F456 router. An attacker exploiting this flaw could crash the device, disrupting network connectivity, or gain control over the router remotely.
Remote code execution could allow an attacker to manipulate network traffic, intercept sensitive data, or use the compromised router as a foothold for further attacks within the network.
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 endpoint /goform/addressNat with an unusually long mitInterface parameter.
A practical detection method is to capture and analyze network traffic to identify POST requests targeting /goform/addressNat that contain excessively long strings in the mitInterface parameter.
- Use a network packet capture tool like tcpdump or Wireshark to filter HTTP POST requests to /goform/addressNat.
- 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 '/goform/addressNat'
- Use tools like curl or custom scripts to test the endpoint by sending a POST request with a long mitInterface parameter and observe the device response.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the vulnerable endpoint /goform/addressNat to trusted networks or IP addresses to prevent remote exploitation.
Additionally, monitoring and blocking suspicious HTTP POST requests with abnormally long mitInterface parameters can reduce the risk of exploitation.
If possible, update the Tenda F456 router firmware to a version that addresses this vulnerability or apply any available patches from the vendor.
As a temporary measure, consider disabling the HTTP service or placing the device behind a firewall that filters malicious traffic targeting this endpoint.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability in Tenda F456 1.0.0.5 allows remote attackers to cause buffer overflow, potentially leading to denial of service or remote code execution on the device. Such a compromise of the router could lead to unauthorized access or disruption of network services.
While the provided information does not explicitly mention compliance with standards like GDPR or HIPAA, exploitation of this vulnerability could result in unauthorized access to sensitive data or interruption of services, which may violate requirements for data protection, confidentiality, and availability under these regulations.
Therefore, organizations using the affected device without mitigation may face increased risk of non-compliance with data protection and security standards due to potential data breaches or service disruptions.