CVE-2026-7032
Remote Buffer Overflow in Tenda F456 SafeEmailFilter Function
Publication date: 2026-04-26
Last updated on: 2026-04-29
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-2026-7032 is a stack-based buffer overflow vulnerability found in the Tenda F456 router version 1.0.0.5. It occurs in the SafeEmailFilter function of the /goform/SafeEmailFilter endpoint, where a user-supplied parameter named "page" is processed without proper bounds checking. Specifically, the parameter is passed to the sprintf function without validating its length, allowing an attacker to overflow the stack buffer.
This vulnerability can be exploited remotely by sending a specially crafted HTTP POST request with an excessively long "page" parameter, which triggers the buffer overflow.
How can this vulnerability impact me? :
Exploiting this vulnerability can lead to serious impacts including denial of service (DoS), where the device crashes or becomes unresponsive, and remote code execution (RCE), where an attacker can execute arbitrary code on the affected router.
This means an attacker could potentially take control of the router remotely, disrupt network services, or use the compromised device as a foothold for further attacks.
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 to the endpoint /goform/SafeEmailFilter containing an excessively long "page" parameter. Such requests may indicate attempts to exploit the buffer overflow.
A practical detection method is to capture and analyze network traffic for these malicious requests.
- Use a network packet capture tool like tcpdump or Wireshark to filter HTTP POST requests to /goform/SafeEmailFilter.
- 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/SafeEmailFilter'
- Inspect captured HTTP POST requests for unusually long "page" parameter values which may trigger the buffer overflow.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the vulnerable endpoint and preventing exploitation attempts.
- Block or filter HTTP POST requests to /goform/SafeEmailFilter at the network perimeter or firewall.
- Limit access to the Tenda F456 router management interface to trusted IP addresses only.
- Monitor logs and network traffic for signs of exploitation attempts.
Since the exploit is publicly known and can lead to remote code execution, consider updating the device firmware if a patch becomes available or replacing the device with a secure alternative.
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 a buffer overflow, potentially leading to denial of service or remote code execution. Such exploitation could compromise the confidentiality, integrity, and availability of data handled by the device.
If the affected device processes or stores personal or sensitive data subject to regulations like GDPR or HIPAA, this vulnerability could lead to unauthorized access or data breaches, thereby impacting compliance with these standards.
However, the provided information does not explicitly detail the impact on compliance with specific standards or regulations.