UTT — CraftedSignal Threat Feed

UTT HiPER 1200GW Buffer Overflow Vulnerability

hello@craftedsignal.io — Fri, 01 May 2026 00:16:25 +0000

A buffer overflow vulnerability has been identified in UTT HiPER 1200GW devices with firmware versions up to 2.5.3-170306. The flaw resides within the strcpy function of the /goform/formRemoteControl file, which handles remote control functionalities. A remote attacker can exploit this vulnerability by sending a specially crafted request to trigger the buffer overflow, potentially leading to arbitrary code execution on the affected device. Publicly available exploit code exists, increasing the risk of exploitation. This vulnerability poses a significant threat to organizations using the affected UTT HiPER 1200GW devices, as it could allow attackers to gain unauthorized access and control over the device and potentially the network it is connected to.

Attack Chain

Attacker identifies a vulnerable UTT HiPER 1200GW device exposed to the internet.
Attacker crafts a malicious HTTP request targeting the /goform/formRemoteControl endpoint.
The malicious request includes a payload designed to overflow the buffer when processed by the strcpy function.
The vulnerable strcpy function within /goform/formRemoteControl copies the attacker-controlled data without proper bounds checking.
The buffer overflow overwrites adjacent memory regions, potentially including critical program data or execution pointers.
The attacker leverages the overflow to inject and execute arbitrary code on the device.
The attacker gains control of the device, potentially escalating privileges.
The attacker uses the compromised device to pivot to other systems on the network, exfiltrate sensitive data, or cause further damage.

Impact

Successful exploitation of this vulnerability could lead to complete compromise of the affected UTT HiPER 1200GW device. Attackers could gain unauthorized access to sensitive data, disrupt device functionality, or use the device as a foothold for further attacks within the network. Given that public exploits are available, the risk of widespread exploitation is high. While the exact number of affected devices is unknown, organizations using UTT HiPER 1200GW devices should take immediate action to mitigate this vulnerability.

Recommendation

Apply available patches or firmware updates from UTT to address the buffer overflow vulnerability in UTT HiPER 1200GW devices.
Monitor network traffic for suspicious requests targeting the /goform/formRemoteControl endpoint, and deploy the Sigma rule Detect Suspicious Requests to FormRemoteControl to identify potentially malicious activity.
Implement input validation and sanitization measures to prevent buffer overflows in web applications.
Consider network segmentation to limit the impact of a compromised device on other systems within the network.
Review and restrict access to the device’s web interface to only authorized personnel.

UTT HiPER 1250GW Buffer Overflow Vulnerability (CVE-2026-7420)

hello@craftedsignal.io — Wed, 29 Apr 2026 23:16:20 +0000

A critical buffer overflow vulnerability, CVE-2026-7420, has been identified in UTT HiPER 1250GW devices. The vulnerability exists in versions up to 3.2.7-210907-180535. The vulnerability lies within the strcpy function in the route/goform/ConfigAdvideo file, where the ‘Profile’ argument is not properly validated, leading to a buffer overflow condition. This allows unauthenticated remote attackers to potentially execute arbitrary code on the device. Publicly available exploits exist, increasing the risk of exploitation. Defenders should implement mitigations and detection strategies immediately.

Attack Chain

The attacker identifies a vulnerable UTT HiPER 1250GW device exposed to the internet.
The attacker crafts a malicious HTTP request targeting the route/goform/ConfigAdvideo endpoint.
The HTTP request includes a ‘Profile’ argument with a payload exceeding the buffer size allocated for it.
The strcpy function attempts to copy the oversized ‘Profile’ argument into the undersized buffer.
The buffer overflow occurs, overwriting adjacent memory regions.
The attacker injects malicious code into the overflowed memory region to gain code execution.
The attacker achieves remote code execution on the UTT HiPER 1250GW device.
The attacker gains control of the device, potentially using it for further malicious activities such as lateral movement, data exfiltration, or denial-of-service attacks.

Impact

Successful exploitation of this vulnerability allows a remote attacker to execute arbitrary code on the UTT HiPER 1250GW device. This can lead to complete compromise of the device, potentially enabling attackers to gain unauthorized access to the network it is connected to, exfiltrate sensitive data, or use the device as a bot in a botnet. The impact is significant, especially if these devices are used in critical infrastructure or sensitive environments.

Recommendation

Apply available patches or firmware updates for UTT HiPER 1250GW devices to remediate CVE-2026-7420.
Implement network segmentation to isolate UTT HiPER 1250GW devices from critical network segments.
Deploy the Sigma rule Detect UTT HiPER Buffer Overflow Attempt to identify malicious HTTP requests targeting the route/goform/ConfigAdvideo endpoint.
Monitor web server logs for unusual activity and large ‘Profile’ argument values in requests to route/goform/ConfigAdvideo to identify potential exploitation attempts.

UTT HiPER 1250GW Buffer Overflow Vulnerability

hello@craftedsignal.io — Wed, 29 Apr 2026 22:16:22 +0000

A buffer overflow vulnerability, identified as CVE-2026-7418, has been discovered in UTT HiPER 1250GW devices with firmware versions up to 3.2.7-210907-180535. The vulnerability resides within the strcpy function in the route/goform/NTP file. A remote attacker can exploit this vulnerability by manipulating the Profile argument during NTP configuration. Successful exploitation could lead to arbitrary code execution on the affected device. The vulnerability has been publicly disclosed, increasing the risk of exploitation. This poses a significant threat to organizations using the affected UTT HiPER 1250GW devices, as attackers could potentially gain control of the device and use it as a foothold for further malicious activities within the network.

Attack Chain

The attacker identifies a vulnerable UTT HiPER 1250GW device with a firmware version up to 3.2.7-210907-180535.
The attacker crafts a malicious HTTP request targeting the /route/goform/NTP endpoint.
The crafted request includes a specially designed Profile argument containing a payload that exceeds the buffer size allocated for it.
The web server on the UTT HiPER 1250GW device receives the HTTP request and passes the Profile argument to the strcpy function.
The strcpy function copies the oversized Profile argument into the undersized buffer, leading to a buffer overflow.
The buffer overflow overwrites adjacent memory regions, potentially including critical program data or executable code.
The attacker gains arbitrary code execution on the device with the privileges of the web server process.
The attacker can then use this foothold to further compromise the device or the network it is connected to, potentially leading to data exfiltration or denial-of-service attacks.

Impact

Successful exploitation of CVE-2026-7418 can allow a remote attacker to execute arbitrary code on the affected UTT HiPER 1250GW device. This could allow the attacker to gain full control of the device, potentially leading to data exfiltration, denial-of-service attacks, or further compromise of the network to which the device is connected. The vulnerability has a CVSS v3.1 score of 8.8, indicating a high severity. Given the public availability of the exploit, organizations using the affected devices are at increased risk.

Recommendation

Apply available patches or firmware updates provided by UTT to address CVE-2026-7418 on HiPER 1250GW devices.
Deploy the Sigma rule Detect Suspicious NTP Profile Argument to detect exploitation attempts against the /route/goform/NTP endpoint.
Monitor web server logs for suspicious requests targeting the /route/goform/NTP endpoint with unusually long Profile arguments to identify potential exploitation attempts.