CVE-2025-7571 in HiPER 840G
Summary
by MITRE • 07/14/2025
A vulnerability classified as critical has been found in UTT HiPER 840G up to 3.1.1-190328. This affects an unknown part of the file /goform/aspApBasicConfigUrcp. The manipulation of the argument Username leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 07/14/2025
The vulnerability identified as CVE-2025-7571 represents a critical buffer overflow flaw within the UTT HiPER 840G network device firmware version 3.1.1-190328 and earlier releases. This security weakness resides in the web interface component located at /goform/aspApBasicConfigUrcp, which processes user input through the Username parameter. The buffer overflow condition occurs when an attacker supplies excessively long input to the Username field, causing memory corruption that can potentially lead to arbitrary code execution or system compromise. The vulnerability's classification as critical stems from its remote exploitability and the disclosed public exploit availability, which significantly increases the risk to affected systems.
The technical implementation of this vulnerability follows the CWE-121 buffer overflow pattern, specifically manifesting as a stack-based buffer overflow within the device's web management interface. When the system processes the Username argument without proper bounds checking or input validation, it fails to enforce length limitations on user-supplied data. This allows an attacker to overwrite adjacent memory locations, potentially corrupting program execution flow or injecting malicious code. The attack vector is remote, meaning no physical access or local network presence is required for exploitation, making the vulnerability particularly dangerous for networked devices that are accessible from the internet.
The operational impact of this vulnerability extends beyond simple system compromise to potentially enable complete network device takeover. Successful exploitation could allow attackers to gain administrative privileges, modify device configurations, install persistent backdoors, or use the compromised device as a pivot point for further network infiltration. Given that this is a network infrastructure device, the attack could result in widespread service disruption, data exfiltration, or use as a launching point for attacks against other systems within the network perimeter. The lack of vendor response to early disclosure attempts compounds the risk, leaving affected organizations without official patches or mitigation guidance during the active exploit period.
Organizations affected by this vulnerability should immediately implement network segmentation to isolate impacted devices from critical network segments, disable unnecessary remote management access where possible, and monitor network traffic for signs of exploitation attempts. The most effective immediate mitigation involves applying vendor patches if available, though the lack of vendor response suggests organizations may need to consider firmware updates from alternative sources or implement network-level firewalls to block access to the vulnerable endpoint. Additionally, implementing intrusion detection systems with signatures for known exploit patterns and conducting thorough network audits to identify all affected devices will help maintain security posture while waiting for official vendor solutions. The vulnerability demonstrates the importance of timely security patch management and vendor communication in maintaining network infrastructure security.