Executive Summary

CVE-2026-5544 is a security vulnerability found in the UTT HiPER 1250GW router firmware up to version 3.2.7-210907-180535. It is a stack-based buffer overflow caused by improper handling of the "Profile" parameter in an HTTP POST request to the /goform/formRemoteControl endpoint.

The vulnerability occurs because the router firmware uses the unsafe strcpy function to copy user input from the "Profile" parameter into a fixed memory location without checking the input length. If an attacker supplies an excessively long "Profile" value, it causes a buffer overflow, potentially overwriting adjacent memory.

Exploitation requires authentication via valid Digest credentials, and the attack can be executed remotely by sending a crafted POST request to the vulnerable endpoint.

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Impact Analysis

This vulnerability can lead to denial of service (DoS) attacks by causing the router to crash or behave unpredictably due to memory corruption from the buffer overflow.

Because the vulnerability allows overwriting adjacent memory, it may also be leveraged by attackers to execute arbitrary code or escalate privileges, although the primary known impact is DoS.

Since exploitation requires authentication, an attacker would need valid credentials, but once exploited, it can disrupt network availability and potentially compromise device integrity.

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Detection Guidance

This vulnerability can be detected by sending an authenticated HTTP POST request to the endpoint /goform/formRemoteControl with a crafted, excessively long "Profile" parameter value. The request must include valid Digest authentication credentials.

A detection command example using curl could be:

• curl -X POST -u username:password --digest -d "Profile=$(python3 -c 'print("A"*1000)')" http://<router-ip>/goform/formRemoteControl

If the device is vulnerable, this request may cause a denial of service or unexpected behavior due to the buffer overflow triggered by the large "Profile" parameter.

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Mitigation Strategies

Immediate mitigation steps include:

• Restrict access to the router's management interface to trusted networks or IP addresses to prevent unauthorized or remote exploitation.
• Ensure that only authenticated users can access the /goform/formRemoteControl endpoint, as exploitation requires valid Digest authentication credentials.
• Monitor network traffic for unusual POST requests to /goform/formRemoteControl with abnormally large "Profile" parameter values.
• Apply any available firmware updates or patches from the vendor addressing this vulnerability once released.

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Compliance Impact

The provided information does not specify how the CVE-2026-5544 vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

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