CVE-2026-25201: MagicInfo9 Server RCE Vulnerability

CVE-2026-25201 Overview

CVE-2026-25201 is an arbitrary file upload vulnerability affecting Samsung MagicINFO 9 Server that allows unauthenticated attackers to upload malicious files and execute remote code. The vulnerability stems from improper validation of uploaded files (CWE-434: Unrestricted Upload of File with Dangerous Type), enabling attackers to bypass security controls and achieve privilege escalation on affected systems.

This vulnerability poses a significant risk to organizations using MagicINFO 9 Server for digital signage management, as successful exploitation requires no authentication and can be performed remotely over the network.

Critical Impact

Unauthenticated remote attackers can upload arbitrary files to execute code and escalate privileges, potentially gaining full control of the MagicINFO 9 Server and connected digital signage infrastructure.

Affected Products

• Samsung MagicINFO 9 Server versions less than 21.1090.1

Discovery Timeline

• 2026-02-02 - CVE-2026-25201 published to NVD
• 2026-02-03 - Last updated in NVD database

Technical Details for CVE-2026-25201

Vulnerability Analysis

The vulnerability exists in the file upload functionality of MagicINFO 9 Server, which fails to properly validate and sanitize uploaded files from unauthenticated users. This weakness allows attackers to upload files with dangerous types, such as web shells or executable scripts, which can then be accessed and executed on the server.

The attack can be performed remotely over the network and requires user interaction to trigger. Once a malicious file is uploaded and executed, the attacker can leverage the server's execution context to escalate privileges within the system. This could lead to complete compromise of the MagicINFO 9 Server, unauthorized access to connected digital signage displays, and potential lateral movement within the organization's network.

Root Cause

The root cause of this vulnerability is the lack of proper file type validation and access controls in the upload functionality of MagicINFO 9 Server. Specifically, the server fails to:

1. Authenticate users before accepting file uploads
2. Validate file extensions and MIME types against an allowlist
3. Sanitize file contents to detect malicious payloads
4. Store uploaded files in a location where they cannot be directly executed

This aligns with CWE-434 (Unrestricted Upload of File with Dangerous Type), a common vulnerability class that occurs when applications accept files without sufficient validation.

Attack Vector

The attack vector for CVE-2026-25201 involves the following exploitation path:

1. An unauthenticated attacker identifies an exposed MagicINFO 9 Server instance
2. The attacker crafts a malicious file (such as a web shell or script)
3. The malicious file is uploaded through the vulnerable upload endpoint
4. The attacker triggers execution of the uploaded file, typically by accessing it through a predictable URL path
5. Code execution occurs with the privileges of the MagicINFO 9 Server process
6. The attacker escalates privileges and establishes persistent access

The vulnerability is exploitable over the network (network attack vector) and while the attack complexity is low, user interaction is required for successful exploitation.

Detection Methods for CVE-2026-25201

Indicators of Compromise

• Unusual file uploads to MagicINFO 9 Server directories, particularly files with executable extensions (.jsp, .php, .aspx, .exe)
• Web shell signatures or backdoor files appearing in upload directories
• Unexpected outbound network connections from the MagicINFO 9 Server
• Anomalous process execution originating from the server's web application context

Detection Strategies

• Monitor file upload endpoints for suspicious file types and unusually large or encoded payloads
• Implement file integrity monitoring on MagicINFO 9 Server installation directories
• Deploy network intrusion detection rules to identify web shell traffic patterns
• Review server access logs for requests to newly created files in upload directories

Monitoring Recommendations

• Enable detailed logging for all file upload operations on MagicINFO 9 Server
• Configure alerts for privilege escalation attempts or suspicious process spawning
• Monitor for authentication bypass attempts targeting management interfaces
• Implement real-time file scanning for uploaded content using endpoint security solutions

How to Mitigate CVE-2026-25201

Immediate Actions Required

• Upgrade MagicINFO 9 Server to version 21.1090.1 or later immediately
• Restrict network access to MagicINFO 9 Server management interfaces using firewall rules
• Audit existing uploaded files for potential web shells or malicious content
• Implement network segmentation to isolate digital signage infrastructure from critical systems

Patch Information

Samsung has addressed this vulnerability in MagicINFO 9 Server version 21.1090.1. Organizations should update to this version or later as soon as possible. For detailed patch information and security updates, refer to the Samsung Smart TV Security Updates page.

SentinelOne customers benefit from automated detection and response capabilities that can identify exploitation attempts targeting this vulnerability. The Singularity platform provides behavioral AI that detects suspicious file operations and code execution patterns associated with arbitrary file upload attacks.

Workarounds

• Implement a Web Application Firewall (WAF) to filter malicious file upload requests
• Configure the server to reject uploads of executable file types at the web server level
• Place the MagicINFO 9 Server behind a reverse proxy with strict access controls
• Disable or restrict the vulnerable upload functionality until patching can be completed

# Example: Restrict upload file types in web server configuration
# Add to your web server configuration to block dangerous file extensions
# Apache example - add to .htaccess or httpd.conf
<FilesMatch "\.(php|jsp|aspx|exe|sh|bat)$">
    Require all denied
</FilesMatch>