CVE-2025-14705: Sgwbox N3 Firmware RCE Vulnerability

CVE-2025-14705 Overview

A critical command injection vulnerability has been identified in Shiguangwu sgwbox N3 firmware version 2.0.25. The vulnerability exists within the SHARESERVER feature component and allows remote attackers to execute arbitrary commands on the affected device by manipulating the params argument. This flaw enables unauthenticated remote command execution, posing a significant threat to network-attached storage devices running vulnerable firmware versions.

The exploit has been publicly disclosed, increasing the risk of active exploitation in the wild. Notably, the vendor was contacted regarding this vulnerability but did not respond, leaving users without an official patch.

Critical Impact

Remote attackers can execute arbitrary system commands on vulnerable sgwbox N3 NAS devices without authentication, potentially leading to complete device compromise, data theft, or lateral movement within the network.

Affected Products

• Shiguangwu sgwbox N3 Firmware version 2.0.25
• sgwbox N3 hardware devices
• sgwbox N3 Firmware (all versions up to 2.0.25)

Discovery Timeline

• December 15, 2025 - CVE-2025-14705 published to NVD
• January 9, 2026 - Last updated in NVD database

Technical Details for CVE-2025-14705

Vulnerability Analysis

This command injection vulnerability resides in the SHARESERVER feature of the sgwbox N3 NAS device firmware. The vulnerability allows attackers to inject malicious commands through improper handling of the params argument. When user-supplied input is passed to this parameter without proper sanitization, it gets executed as system commands with the privileges of the underlying service.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any prior authentication or user interaction. Successful exploitation grants attackers the ability to execute arbitrary commands, potentially leading to full system compromise of the NAS device.

Root Cause

The root cause of CVE-2025-14705 is classified under CWE-77 (Command Injection) and CWE-74 (Improper Neutralization of Special Elements in Output). The SHARESERVER feature fails to properly sanitize user-controlled input in the params argument before passing it to system shell commands. This allows metacharacters and command separators to be interpreted by the underlying shell, enabling arbitrary command execution.

The lack of input validation or output encoding permits attackers to break out of the intended command context and inject their own system commands, which are then executed with the privileges of the web server or service handling the request.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests targeting the SHARESERVER feature endpoint, injecting shell commands through the params parameter. Common injection techniques include:

The vulnerability can be exploited by sending specially crafted requests containing shell metacharacters such as semicolons, pipes, or command substitution syntax. These injected commands execute in the context of the vulnerable service, potentially granting full control over the NAS device. Attackers may leverage this access to exfiltrate stored data, establish persistent backdoors, pivot to other network resources, or deploy ransomware.

For detailed technical analysis of this vulnerability, refer to the Notion Command Injection Analysis documentation.

Detection Methods for CVE-2025-14705

Indicators of Compromise

• Unusual outbound connections from sgwbox N3 devices to unknown external IP addresses
• Unexpected processes spawned by the web server or SHARESERVER service
• Modified system files or creation of unauthorized user accounts on the NAS device
• HTTP access logs showing requests to SHARESERVER endpoints with suspicious params values containing shell metacharacters

Detection Strategies

• Deploy network intrusion detection rules to identify HTTP requests containing command injection patterns targeting sgwbox devices
• Monitor web server access logs for requests to SHARESERVER endpoints with anomalous parameter values including shell special characters (;, |, $(), backticks)
• Implement egress filtering and monitor for unexpected outbound connections from NAS devices
• Use endpoint detection and response (EDR) solutions to identify suspicious process execution chains on network devices

Monitoring Recommendations

• Enable verbose logging on sgwbox N3 devices and forward logs to a centralized SIEM for analysis
• Create alerts for authentication failures or unauthorized access attempts targeting NAS management interfaces
• Monitor for indicators of post-exploitation activity such as reverse shells, cryptominer processes, or data exfiltration patterns
• Implement network segmentation to isolate NAS devices and monitor cross-segment traffic anomalies

How to Mitigate CVE-2025-14705

Immediate Actions Required

• Isolate affected sgwbox N3 devices from untrusted networks immediately
• Place vulnerable devices behind a firewall and restrict access to trusted IP addresses only
• Disable the SHARESERVER feature if not required for business operations
• Monitor device logs for signs of exploitation and conduct forensic analysis if compromise is suspected
• Consider replacing vulnerable devices with supported alternatives if no vendor patch becomes available

Patch Information

As of the last update, the vendor (Shiguangwu) has not responded to disclosure attempts and no official patch has been released. Users should monitor vendor communications and the VulDB entry for any updates regarding security fixes.

Workarounds

• Implement network-level access controls to restrict access to the device management interface and SHARESERVER feature to trusted internal networks only
• Deploy a web application firewall (WAF) in front of the device to filter requests containing command injection patterns
• Disable remote access to the NAS device and require VPN connections for remote administration
• If possible, disable or remove the vulnerable SHARESERVER component entirely until a patch is available

# Network isolation example using iptables
# Restrict access to sgwbox N3 device (replace with actual device IP)
iptables -A INPUT -d 192.168.1.100 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -d 192.168.1.100 -j DROP

# Block external access to web interface port (commonly 80/443)
iptables -A INPUT -d 192.168.1.100 -p tcp --dport 80 -s ! 192.168.1.0/24 -j DROP
iptables -A INPUT -d 192.168.1.100 -p tcp --dport 443 -s ! 192.168.1.0/24 -j DROP