CVE-2026-7419: UTT HiPER 1250GW Buffer Overflow Flaw

CVE-2026-7419 Overview

A buffer overflow vulnerability has been identified in UTT HiPER 1250GW wireless routers running firmware versions up to 3.2.7-210907-180535. This issue affects the strcpy function within the file route/goform/formTaskEdit_ap, where improper handling of the Profile argument leads to a classic buffer overflow condition. The vulnerability is remotely exploitable over the network, and a public exploit is reportedly available.

Critical Impact
Remote attackers can exploit this buffer overflow vulnerability to potentially execute arbitrary code, crash the device, or gain unauthorized control over affected UTT HiPER 1250GW routers.

Affected Products

UTT HiPER 1250GW firmware versions up to 3.2.7-210907-180535
UTT HiPER 1250GW wireless gateway devices

Discovery Timeline

2026-04-29 - CVE-2026-7419 published to NVD
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-7419

Vulnerability Analysis

This vulnerability is classified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). The root cause lies in the unsafe use of the strcpy function when processing the Profile parameter in the web management interface. When a user-controlled input is passed to this function without proper bounds checking, attackers can overflow the destination buffer and corrupt adjacent memory regions.

The attack is network-based and requires low-privileged authentication to exploit. Once exploited, an attacker can achieve high impact across confidentiality, integrity, and availability of the affected device. Given that this affects an IoT/network infrastructure device, successful exploitation could provide attackers with a foothold into the target network or enable denial of service attacks against network connectivity.

Root Cause

The vulnerability stems from the use of the unsafe strcpy function to copy user-supplied data from the Profile argument into a fixed-size buffer without validating the input length. The strcpy function does not perform bounds checking, making it susceptible to buffer overflow attacks when the source string exceeds the destination buffer's allocated size. This is a common vulnerability pattern in embedded systems and IoT devices where legacy C code is prevalent.

Attack Vector

The attack is conducted remotely over the network by sending a specially crafted HTTP request to the vulnerable endpoint at route/goform/formTaskEdit_ap. An authenticated attacker with low privileges can manipulate the Profile parameter to include an oversized payload that overflows the buffer when processed by the strcpy function.

The exploitation flow involves:

Authenticating to the device's web management interface with low-level credentials
Crafting a malicious request targeting the formTaskEdit_ap form handler
Providing an excessively long string in the Profile parameter
The strcpy function copies this oversized input without bounds checking
Memory corruption occurs, potentially allowing code execution or device crash

For technical details regarding the exploitation mechanism, refer to the GitHub IOT Vulnerability Report.

Detection Methods for CVE-2026-7419

Indicators of Compromise

Unusual HTTP POST requests to /goform/formTaskEdit_ap endpoint with abnormally large Profile parameter values
Device crashes, unexpected reboots, or unresponsive web management interfaces
Anomalous network traffic patterns originating from UTT HiPER 1250GW devices
Log entries showing repeated failed or malformed requests to the vulnerable endpoint

Detection Strategies

Implement network intrusion detection rules to identify HTTP requests with oversized parameters targeting UTT HiPER devices
Monitor for HTTP POST requests to goform/formTaskEdit_ap containing Profile parameters exceeding normal length thresholds
Deploy web application firewall (WAF) rules to block requests with anomalous payload sizes
Enable logging on network devices to capture and analyze traffic to IoT management interfaces

Monitoring Recommendations

Continuously monitor UTT HiPER 1250GW device health metrics for signs of instability or unexpected restarts
Implement network segmentation and monitor traffic flows between IoT devices and other network segments
Set up alerts for authentication attempts to device management interfaces from unexpected IP addresses
Review firewall logs for external connection attempts to IoT device management ports

How to Mitigate CVE-2026-7419

Immediate Actions Required

Restrict network access to the UTT HiPER 1250GW management interface to trusted IP addresses only
Implement network segmentation to isolate vulnerable devices from critical network assets
Disable remote management access if not required for operations
Monitor for vendor firmware updates that address this vulnerability
Consider deploying a web application firewall in front of device management interfaces

Patch Information

No vendor patch information is currently available for this vulnerability. Organizations should monitor UTT's official channels for security updates. Technical details and vulnerability reports are available at:

Workarounds

Restrict management interface access using firewall rules to allow only trusted administrative IP addresses
Place UTT HiPER 1250GW devices behind a reverse proxy that performs input validation and length checking
Disable the web management interface entirely and use alternative configuration methods if available
Implement network-level access controls (ACLs) to limit which hosts can reach the device management port
Consider replacing affected devices with alternatives that receive regular security updates if no patch becomes available

bash

# Example firewall rule to restrict management interface access
# Allow management access only from trusted admin subnet
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP

# Block external access to IoT management interfaces
iptables -A INPUT -i eth0 -p tcp --dport 80 -j DROP