CVE-2025-11571: Network-Based RCE Vulnerability

CVE-2025-11571 Overview

CVE-2025-11571 is a command injection vulnerability affecting vulnerable endpoints that accept user-controlled input through a URL in JSON format. This flaw enables an attacker to execute commands on the target system, specifically allowing the opening of executables. While the vulnerability is limited in that commands cannot pass parameters or arguments, it still presents a security risk for systems exposed on shared networks.

Critical Impact

Network-adjacent attackers can execute commands to open executables on vulnerable systems through crafted JSON payloads in URL parameters.

Affected Products

• Silicon Labs products with vulnerable endpoints (specific versions not disclosed)

Discovery Timeline

• 2026-03-24 - CVE CVE-2025-11571 published to NVD
• 2026-03-25 - Last updated in NVD database

Technical Details for CVE-2025-11571

Vulnerability Analysis

This vulnerability is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly known as OS Command Injection. The flaw exists in endpoints that process user-supplied input via URL parameters formatted as JSON. Due to insufficient input validation, an attacker can craft malicious JSON payloads that result in the execution of system commands.

A key limitation of this vulnerability is that while executable files can be launched, the attacker cannot pass command-line arguments or parameters to those executables. This constraint reduces the severity of potential exploitation but does not eliminate the risk entirely, as launching certain executables without arguments could still lead to information disclosure or system state changes.

Root Cause

The root cause of CVE-2025-11571 is improper input validation and sanitization of user-controlled data received through URL parameters in JSON format. The vulnerable endpoints fail to adequately neutralize special characters or command sequences before passing the input to system command execution functions. This allows attackers to inject OS commands that the system interprets and executes.

Attack Vector

The attack requires the attacker to be on the same network as the vulnerable system. The exploitation is network-based, requiring active user interaction. An attacker would craft a malicious JSON payload containing command injection sequences and deliver it via a URL to the vulnerable endpoint.

The attack flow involves:

1. Identifying a vulnerable endpoint that accepts JSON input via URL parameters
2. Crafting a JSON payload containing command execution directives
3. Submitting the payload to the target endpoint from within the same network
4. The endpoint processes the input and executes the embedded command

Since no verified code examples are available for this vulnerability, technical implementation details can be found in the Silicon Labs Community Post.

Detection Methods for CVE-2025-11571

Indicators of Compromise

• Unexpected executable launches on systems hosting vulnerable endpoints
• Unusual network traffic patterns targeting JSON-accepting endpoints from internal network sources
• Web server logs showing JSON payloads with potential command injection patterns in URL parameters

Detection Strategies

• Monitor web application logs for suspicious JSON payloads in URL parameters that contain command-like strings
• Implement network-based intrusion detection rules to identify potential command injection attempts in HTTP requests
• Deploy endpoint detection to identify unexpected process spawning from web server processes

Monitoring Recommendations

• Enable detailed logging on all endpoints that accept JSON input via URL parameters
• Correlate web server logs with endpoint process creation events to identify anomalous behavior
• Monitor for unusual executable launches that correlate with incoming web requests

How to Mitigate CVE-2025-11571

Immediate Actions Required

• Review all endpoints that accept JSON input via URL parameters and implement strict input validation
• Apply network segmentation to limit exposure of vulnerable systems to untrusted network segments
• Implement web application firewall (WAF) rules to filter potential command injection payloads

Patch Information

For official patch information and remediation guidance, refer to the Silicon Labs Community Post. Organizations should monitor Silicon Labs security advisories for updates regarding this vulnerability.

Workarounds

• Implement strict allowlist-based input validation for all JSON parameters accepted via URLs
• Restrict network access to vulnerable endpoints to trusted hosts only using firewall rules
• Disable or remove vulnerable endpoints if they are not required for business operations
• Deploy application-level sandboxing to limit the impact of any successful command execution