CVE-2025-15428: UTT Router Buffer Overflow Vulnerability

CVE-2025-15428 Overview

A buffer overflow vulnerability has been identified in the UTT 进取 512W router firmware version 1.7.7-171114. The vulnerability exists in the strcpy function within the /goform/formRemoteControl endpoint, where improper handling of the Profile argument allows an attacker to trigger a buffer overflow condition. This vulnerability can be exploited remotely by authenticated attackers, potentially leading to arbitrary code execution or denial of service on the affected device.

Critical Impact

Remote attackers with low privileges can exploit this buffer overflow to compromise network router devices, potentially gaining full control of the device or causing network disruption.

Affected Products

• UTT 进取 512W version 1.7.7-171114

Discovery Timeline

• 2026-01-02 - CVE-2025-15428 published to NVD
• 2026-01-02 - Last updated in NVD database

Technical Details for CVE-2025-15428

Vulnerability Analysis

This vulnerability is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). The flaw occurs in the web management interface of the UTT 进取 512W router, specifically within the remote control functionality accessible via the /goform/formRemoteControl endpoint.

The vulnerable code path utilizes the strcpy function to copy user-supplied data from the Profile parameter without proper bounds checking. Since strcpy does not validate the length of the source string before copying, an attacker can provide an oversized input that exceeds the destination buffer's allocated memory space, resulting in adjacent memory being overwritten.

The vendor was contacted about this vulnerability but did not respond, leaving users without an official remediation path. A proof-of-concept has been made publicly available, increasing the risk of exploitation.

Root Cause

The root cause of this vulnerability is the use of the unsafe strcpy function to handle user-controlled input without implementing proper input validation or bounds checking. The Profile argument passed to the /goform/formRemoteControl handler is directly copied into a fixed-size buffer, allowing attackers to overflow the buffer by supplying input exceeding the expected length.

Attack Vector

The attack can be initiated remotely over the network by sending a crafted HTTP request to the vulnerable endpoint. The attacker requires low-level authentication to access the affected functionality. By manipulating the Profile parameter with an oversized payload, the attacker can:

1. Corrupt adjacent memory structures
2. Potentially overwrite return addresses or function pointers
3. Achieve arbitrary code execution with the privileges of the router's web service
4. Cause a denial of service by crashing the device

The vulnerability mechanism involves sending malformed requests to the /goform/formRemoteControl endpoint with an oversized Profile parameter value. When the router's web service processes this request, the strcpy function copies the malicious payload without bounds checking, leading to memory corruption. For detailed technical information, refer to the GitHub PoC Repository.

Detection Methods for CVE-2025-15428

Indicators of Compromise

• Unusual HTTP POST requests to /goform/formRemoteControl with abnormally large Profile parameter values
• Unexpected router reboots or service crashes
• Anomalous network traffic patterns originating from or directed to the router's management interface
• Modified router configurations or unauthorized administrative access

Detection Strategies

• Monitor web server logs for requests to /goform/formRemoteControl containing oversized parameters
• Implement network intrusion detection rules to identify buffer overflow attack patterns targeting UTT routers
• Configure alerts for unexpected service restarts on network devices
• Deploy web application firewalls (WAF) to filter malicious requests before reaching vulnerable endpoints

Monitoring Recommendations

• Enable comprehensive logging on the router's web management interface
• Establish baseline network behavior to detect anomalous traffic patterns
• Implement real-time alerting for suspicious activities targeting router management endpoints
• Regularly review device logs for signs of exploitation attempts

How to Mitigate CVE-2025-15428

Immediate Actions Required

• Restrict access to the router's web management interface to trusted networks only
• Implement network segmentation to isolate vulnerable devices from untrusted networks
• Disable remote management functionality if not required
• Monitor for any suspicious activity targeting the affected endpoint
• Consider replacing the device with a supported alternative if no patch becomes available

Patch Information

No official patch is currently available from the vendor. According to the vulnerability disclosure, UTT was contacted about this issue but did not respond. Users should monitor the vendor's website for potential security updates and consider alternative mitigation strategies until a patch is released.

For additional technical details, refer to VulDB Entry #339350.

Workarounds

• Configure firewall rules to block external access to the router's web management interface (typically port 80/443)
• Implement IP-based access control lists (ACLs) to restrict management access to authorized administrators only
• Place the router behind a VPN to require authentication before accessing the management interface
• If possible, disable the web-based management interface and use alternative configuration methods

# Example firewall rule to restrict access to router management interface
# Block external access to web management ports
iptables -A INPUT -p tcp --dport 80 -s ! 192.168.1.0/24 -j DROP
iptables -A INPUT -p tcp --dport 443 -s ! 192.168.1.0/24 -j DROP