CVE-2025-46271: UNI-NMS-Lite RCE Vulnerability

CVE-2025-46271 Overview

CVE-2025-46271 is a critical command injection vulnerability (CWE-78) affecting UNI-NMS-Lite, a network management system. This vulnerability allows an unauthenticated attacker to execute arbitrary operating system commands on the affected device, potentially enabling them to read or manipulate sensitive device data without requiring any prior authentication.

Critical Impact

Unauthenticated attackers can exploit this command injection flaw to read or manipulate device data, potentially compromising the entire network management infrastructure.

Affected Products

• UNI-NMS-Lite (Network Management System)

Discovery Timeline

• 2025-04-24 - CVE-2025-46271 published to NVD
• 2025-04-29 - Last updated in NVD database

Technical Details for CVE-2025-46271

Vulnerability Analysis

This vulnerability falls under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS Command Injection. The flaw exists in UNI-NMS-Lite's input handling mechanisms, where user-supplied data is improperly sanitized before being passed to operating system command execution functions.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without physical access to the target system. The attack requires no authentication, no user interaction, and has low complexity, making it particularly dangerous for exposed network management systems. Successful exploitation grants attackers high-impact access to confidentiality and integrity of the managed device data.

Root Cause

The root cause stems from inadequate input validation and sanitization in UNI-NMS-Lite. When processing certain user-controlled input parameters, the application fails to properly neutralize special characters and command separators (such as ;, |, &&, or backticks) before incorporating user data into OS command strings. This allows attackers to inject malicious commands that the system executes with the privileges of the application process.

Attack Vector

The attack is network-based, requiring an attacker to send specially crafted requests to the vulnerable UNI-NMS-Lite instance. The exploitation flow typically involves:

1. An attacker identifies an exposed UNI-NMS-Lite instance accessible over the network
2. The attacker crafts a malicious request containing OS command injection payloads in vulnerable input parameters
3. The application processes the request without proper sanitization, passing the malicious input to system command execution functions
4. The injected commands execute with the application's privileges, allowing data exfiltration or manipulation

The vulnerability allows for reading sensitive device data, modifying configuration settings, and potentially pivoting to other network devices managed by the compromised system. For detailed technical information, refer to the CISA ICS Advisory ICSA-25-114-06.

Detection Methods for CVE-2025-46271

Indicators of Compromise

• Unusual outbound network connections from UNI-NMS-Lite servers to unknown external hosts
• Unexpected process spawning from UNI-NMS-Lite application processes (such as sh, bash, cmd, or powershell)
• Anomalous file system access patterns, particularly reads of sensitive configuration files
• Suspicious command-line arguments in process logs containing shell metacharacters

Detection Strategies

• Implement network intrusion detection rules to identify command injection patterns in HTTP requests targeting UNI-NMS-Lite
• Monitor application logs for requests containing shell metacharacters such as ;, |, &&, $(), or backticks
• Deploy endpoint detection and response (EDR) solutions to detect anomalous child process creation from the NMS application
• Utilize SentinelOne's behavioral AI to identify post-exploitation activities indicative of command injection attacks

Monitoring Recommendations

• Enable verbose logging on UNI-NMS-Lite and forward logs to a centralized SIEM for correlation analysis
• Implement alerting for any process execution originating from the UNI-NMS-Lite service context that matches shell interpreters
• Monitor network traffic for data exfiltration patterns from network management system hosts
• Regularly audit access logs for unauthenticated requests to sensitive API endpoints

How to Mitigate CVE-2025-46271

Immediate Actions Required

• Restrict network access to UNI-NMS-Lite instances using firewall rules, limiting connectivity to trusted management networks only
• Implement network segmentation to isolate network management systems from general user networks
• Deploy a web application firewall (WAF) with command injection detection rules in front of vulnerable instances
• Review system and application logs for evidence of prior exploitation attempts

Patch Information

Organizations should consult the CISA ICS Advisory ICSA-25-114-06 for official remediation guidance and patch availability from the vendor. Apply vendor-provided security updates as soon as they become available.

Workarounds

• Place UNI-NMS-Lite behind a VPN to limit exposure to authenticated users only
• Implement strict input validation at the network perimeter using reverse proxy or WAF rules
• Disable any unnecessary features or endpoints in UNI-NMS-Lite that may expose command execution functionality
• Consider temporarily taking vulnerable instances offline if they are not critical to operations until patches are applied

# Example: Restrict network access using iptables
# Allow only trusted management subnet to access UNI-NMS-Lite
iptables -A INPUT -p tcp --dport 80 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP