CVE-2026-3814
Remote Buffer Overflow in UTT HiPER 810G strcpy Function
Publication date: 2026-03-09
Last updated on: 2026-03-10
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| utt | 810g_firmware | to 1.7.7-171114 (inc) |
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?
[{'type': 'paragraph', 'content': 'CVE-2026-3814 is a critical buffer overflow vulnerability in the UTT HiPER 810G router firmware up to version 1.7.7-1711. The flaw exists in the strcpy function used in the /goform/getOneApConfTempEntry endpoint, where input is copied without proper length checking.'}, {'type': 'paragraph', 'content': 'An attacker can exploit this vulnerability by sending a crafted POST request with a large payload in the "tempName" parameter, causing a stack-based buffer overflow. This can lead to denial of service or potentially allow arbitrary code execution.'}, {'type': 'paragraph', 'content': 'The exploit requires authentication using Digest authentication with valid credentials, but once authenticated, the attacker can remotely trigger the vulnerability.'}] [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing an attacker to remotely exploit the buffer overflow to cause denial of service (DoS) or potentially execute arbitrary code on the affected device.
Successful exploitation could compromise the confidentiality, integrity, and availability of the device, potentially leading to unauthorized control or disruption of network services.
Since the exploit is publicly available and easy to execute, the risk of attack is significant if the device remains unpatched or unmitigated.
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 sending a crafted POST request to the endpoint /goform/getOneApConfTempEntry on the UTT HiPER 810G device. The request should include a large payload in the "tempName" parameter to test for buffer overflow behavior.'}, {'type': 'paragraph', 'content': 'The exploit requires Digest authentication with valid credentials, so detection commands should include authentication headers.'}, {'type': 'paragraph', 'content': 'A sample detection command using curl might look like this:'}, {'type': 'list_item', 'content': 'curl -X POST -u username:password --digest -d "tempName=$(python3 -c \'print("A"*1000)\')" http://<target-ip>/goform/getOneApConfTempEntry'}, {'type': 'paragraph', 'content': 'If the device crashes, behaves unexpectedly, or returns an error related to buffer overflow, it indicates the presence of the vulnerability.'}] [1]
What immediate steps should I take to mitigate this vulnerability?
No official patches or mitigations are currently available for this vulnerability.
Immediate mitigation steps include restricting access to the vulnerable endpoint /goform/getOneApConfTempEntry by network segmentation or firewall rules to prevent remote exploitation.
Additionally, disable or limit the use of Digest authentication on the device if possible, or enforce strong authentication credentials to reduce the risk of exploitation.
Ultimately, replacing the affected UTT HiPER 810G device with a non-vulnerable alternative is recommended to fully mitigate the risk.