CVE-2026-6186
Remote Buffer Overflow in UTT HiPER 1200GW strcpy Function
Publication date: 2026-04-13
Last updated on: 2026-04-13
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| utt | hiper_1200gw | to 2.5.3-170306 (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?
CVE-2026-6186 is a critical buffer overflow vulnerability found in the UTT HiPER 1200GW router firmware versions up to 2.5.3-170306. It occurs in the handling of HTTP POST requests to the endpoint /goform/formNatStaticMap. The vulnerability arises because the router's firmware uses the unsafe strcpy function to copy data from the NatBind parameter without proper bounds checking.
When a specially crafted POST request with an excessively long NatBind parameter is sent, it causes a buffer overflow. This happens particularly when certain expected parameters like "action" are missing, causing the code to enter a branch that leads to the overflow. Exploiting this vulnerability can lead to denial of service (DoS) and potentially other malicious impacts due to memory corruption.
How can this vulnerability impact me? :
This vulnerability can be exploited remotely by an attacker sending a specially crafted POST request to the affected router. The immediate impact is a denial of service (DoS), which can disrupt network connectivity by crashing or destabilizing the router.
Beyond DoS, the buffer overflow caused by this vulnerability may allow attackers to execute arbitrary code or cause memory corruption, potentially leading to further compromise of the device or 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 to the endpoint /goform/formNatStaticMap on UTT HiPER 1200GW routers running firmware up to version 2.5.3-170306.
Specifically, detection involves identifying POST requests containing an excessively long NatBind parameter, which triggers the buffer overflow.
A practical approach is to capture and analyze network traffic targeting the router's IP (commonly 192.168.1.1) for such malformed requests.
Example commands to detect this might include using packet capture tools like tcpdump or Wireshark to filter HTTP POST requests to /goform/formNatStaticMap and inspecting the NatBind parameter length.
- tcpdump -i <interface> -A 'tcp dst port 80 and (((ip dst 192.168.1.1) and (tcp[32:4] = 0x504f5354)))'
- Use Wireshark to filter HTTP POST requests to /goform/formNatStaticMap and check for unusually long NatBind parameter values.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the vulnerable router's management interface to trusted networks only.
Disable remote management if enabled, to prevent remote exploitation.
Monitor and block suspicious POST requests to /goform/formNatStaticMap, especially those with unusually long NatBind parameters.
Apply any available firmware updates or patches from the vendor addressing this vulnerability.
If no patch is available, consider replacing or isolating the affected device to prevent exploitation.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how the CVE-2026-6186 vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.