Buffer Overflow in UTT HiPER 1250GW Firmware

Executive Summary

CVE-2026-7419 is a buffer overflow vulnerability found in the UTT HiPER 1250GW router firmware up to version 3.2.7-210907-180535. It occurs in the strcpy function within the route/goform/formTaskEdit_ap endpoint when the Profile parameter is manipulated. Specifically, if the src_6 parameter is not set to "01," the strcpy(dest, src_1) call can overflow the buffer, potentially allowing an attacker to execute arbitrary code or cause a denial of service.

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Detection Guidance

This vulnerability can be detected by monitoring for suspicious POST requests to the endpoint route/goform/formTaskEdit_ap on UTT HiPER 1250GW routers running vulnerable firmware versions. Specifically, crafted POST requests manipulating the Profile parameter and not setting the src_6 parameter to "01" may indicate exploitation attempts.

A detection approach could involve capturing network traffic and filtering for POST requests to the vulnerable endpoint. For example, using a tool like tcpdump or tshark:

• tcpdump -i <interface> -A -s 0 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' | grep 'POST /route/goform/formTaskEdit_ap'

Additionally, inspecting logs on the device or any web application firewall (WAF) for POST requests containing the Profile parameter and unusual values for src_6 can help identify exploitation attempts.

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Impact Analysis

This vulnerability can have serious impacts including unauthorized remote code execution, which may allow an attacker to take control of the affected device.

It can also lead to denial of service conditions, disrupting normal operations of the device.

Since the exploit is publicly available, the risk of exploitation is higher, especially if the device is exposed to untrusted networks.

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Compliance Impact

The CVE-2026-7419 vulnerability is a buffer overflow in the UTT HiPER 1250GW router that can be remotely exploited, potentially leading to denial of service or other impacts. Such vulnerabilities can compromise the confidentiality, integrity, and availability of data processed or transmitted by the affected device.

While the provided information does not explicitly mention compliance with standards like GDPR or HIPAA, the presence of a high-severity remote exploitable vulnerability could lead to non-compliance with these regulations. This is because these standards require organizations to ensure the security of personal and sensitive data, and unpatched vulnerabilities that allow unauthorized access or disruption may violate these requirements.

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Mitigation Strategies

Immediate mitigation steps include restricting access to the vulnerable endpoint by implementing network-level controls such as firewall rules to block unauthorized POST requests to route/goform/formTaskEdit_ap.

Additionally, monitor and filter incoming traffic to detect and block exploit attempts that manipulate the Profile parameter or send malformed requests.

If possible, update the firmware of the UTT HiPER 1250GW device to a version later than v3.2.7-210907-180535 where this vulnerability is fixed.

Until a patch is applied, consider disabling or limiting remote management features that expose the vulnerable API endpoint.

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