CVE-2026-6630
Remote Buffer Overflow in Tenda F451 httpd Component
Publication date: 2026-04-20
Last updated on: 2026-04-20
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | f451 | 1.0.0.7_cn_svn7958 |
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?
This vulnerability exists in the Tenda F451 device, specifically in the function fromGstDhcpSetSer within the httpd component. It is caused by improper handling of the argument 'dips', which leads to a buffer overflow. This means that an attacker can remotely manipulate this argument to overflow the buffer, potentially causing unexpected behavior or allowing exploitation.
How can this vulnerability impact me? :
The vulnerability can be exploited remotely, which means an attacker does not need physical access to the device. The buffer overflow can lead to severe consequences such as denial of service, unauthorized code execution, or full compromise of the affected device. This can result in loss of control over the device, disruption of network services, or further attacks on connected systems.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring for HTTP POST requests sent to the endpoint "/goform/GstDhcpSetSer" that contain an unusually long "dips" parameter.
A practical detection method is to capture network traffic and look for POST requests with a "dips" parameter exceeding normal length, which may indicate an attempt to exploit the buffer overflow.
For example, using command-line tools like curl or netcat, you can simulate or detect such requests.
- Use a network packet capture tool (e.g., tcpdump or Wireshark) to filter HTTP POST requests to "/goform/GstDhcpSetSer" and inspect the "dips" parameter length.
- 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/GstDhcpSetSer'
- Use curl to test the endpoint with a long dips parameter: curl -X POST http://<target-ip>/goform/GstDhcpSetSer -d 'dips=$(python3 -c "print('a'*2048)")'
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the vulnerable endpoint and applying input validation or length checks on the "dips" parameter.
Since the vulnerability is exploitable remotely via HTTP POST requests, network-level controls such as firewall rules to block or limit access to the "/goform/GstDhcpSetSer" endpoint can reduce risk.
Additionally, updating the device firmware to a version that patches this vulnerability is strongly recommended once available.
- Block or restrict HTTP POST requests to "/goform/GstDhcpSetSer" from untrusted networks using firewall or access control lists.
- Monitor and alert on unusually long "dips" parameter values in HTTP requests.
- Contact the vendor for firmware updates or patches addressing this buffer overflow issue.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.