Compliance Impact

The vulnerability in UTT HiPER 1200GW allows remote attackers to execute arbitrary code or cause denial of service via a buffer overflow in the web management interface. This can lead to unauthorized access or control over the device.

Such unauthorized access or compromise of device integrity could result in exposure or manipulation of sensitive data, potentially violating data protection regulations like GDPR or HIPAA that require safeguarding personal or health information.

Therefore, this vulnerability poses a risk to compliance with common standards and regulations by undermining the security controls necessary to protect sensitive data.

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Executive Summary

CVE-2026-9627 is a buffer overflow vulnerability found in the UTT HiPER 1200GW router firmware up to version 2.5.3-170306. The flaw exists in the Web Management Interface, specifically in the /goform/setSysAdm endpoint.

An attacker can exploit this vulnerability by sending a specially crafted request with an excessively long password parameter. This triggers a buffer overflow in the strcpy function, which copies data without properly checking the input length.

As a result, the attacker can cause arbitrary code execution or denial of service by overflowing the memory buffer.

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Impact Analysis

This vulnerability can have serious impacts including allowing a remote attacker to execute arbitrary code on the affected device or cause it to crash, resulting in denial of service.

Such exploitation could lead to unauthorized control over the router, potentially compromising network security and availability.

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Detection Guidance

This vulnerability can be detected by monitoring for unusual or suspicious HTTP POST requests to the /goform/setSysAdm endpoint on the UTT HiPER 1200GW router.

Specifically, detection involves identifying POST requests containing an excessively long password parameter (passwd1), such as a string of 256 characters, which triggers the buffer overflow.

You can use network monitoring tools or packet capture utilities like tcpdump or Wireshark to filter HTTP POST requests to /goform/setSysAdm and inspect the length of the passwd1 parameter.

• 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/setSysAdm'
• Use tools like curl or custom scripts to send test POST requests with long passwd1 parameters to verify if the system is vulnerable.

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Mitigation Strategies

Immediate mitigation steps include restricting access to the Web Management Interface, especially the /goform/setSysAdm endpoint, to trusted networks or IP addresses only.

Additionally, monitor and block suspicious POST requests with unusually long passwd1 parameters to prevent exploitation.

If possible, update the firmware of the UTT HiPER 1200GW router to a version later than 2.5.3-170306 where this vulnerability is fixed.

Until a patch is available, consider disabling remote management features or the Web Management Interface if not strictly necessary.

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