CVE-2026-4220: TIM Platform RCE Vulnerability via Upload

CVE-2026-4220 Overview

A vulnerability has been identified in Technologies Integrated Management Platform version 7.17.0 that allows unrestricted file uploads through the /SetWebpagePic.jsp endpoint. This improper access control flaw enables remote attackers to upload arbitrary files by manipulating the targetPath and Suffix parameters, potentially leading to remote code execution or system compromise.

Critical Impact

Remote attackers can exploit this unrestricted file upload vulnerability to upload malicious files, potentially achieving code execution on affected systems. The exploit has been publicly disclosed and the vendor has not responded to disclosure attempts.

Affected Products

• Technologies Integrated Management Platform 7.17.0

Discovery Timeline

• 2026-03-16 - CVE-2026-4220 published to NVD
• 2026-03-16 - Last updated in NVD database

Technical Details for CVE-2026-4220

Vulnerability Analysis

This vulnerability is classified under CWE-284 (Improper Access Control), indicating that the affected endpoint fails to properly validate or restrict file upload operations. The /SetWebpagePic.jsp file contains functionality that processes user-supplied input for the targetPath and Suffix parameters without adequate security controls. This allows attackers to specify arbitrary file destinations and file extensions, bypassing any intended restrictions on file types or upload locations.

The vulnerability can be exploited remotely without authentication, making it accessible to any attacker with network access to the vulnerable endpoint. Once exploited, an attacker could upload web shells, malicious scripts, or other dangerous files to the server, potentially gaining persistent access or the ability to execute arbitrary commands.

Root Cause

The root cause of this vulnerability lies in the improper access control implementation within the /SetWebpagePic.jsp endpoint. The application fails to properly validate and sanitize the targetPath and Suffix parameters before processing file upload requests. This lack of input validation combined with missing authorization checks allows attackers to manipulate these parameters to upload files to arbitrary locations with arbitrary extensions.

Attack Vector

The attack can be initiated remotely over the network. An attacker can craft malicious HTTP requests to the /SetWebpagePic.jsp endpoint, manipulating the targetPath parameter to specify the upload destination and the Suffix parameter to control the file extension. This enables the upload of executable files such as JSP web shells that can then be accessed to execute arbitrary commands on the server.

The attack does not require any authentication or user interaction, making it particularly dangerous for internet-facing deployments of the affected platform.

Detection Methods for CVE-2026-4220

Indicators of Compromise

• Unexpected HTTP POST requests to /SetWebpagePic.jsp containing suspicious targetPath or Suffix parameters
• New or modified JSP, PHP, or other executable files appearing in web-accessible directories
• Unusual file upload activity patterns or large volumes of requests to the vulnerable endpoint
• Web server logs showing requests with path traversal sequences or unusual file extensions in upload parameters

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing path traversal patterns or suspicious file extensions targeting /SetWebpagePic.jsp
• Configure file integrity monitoring (FIM) on web-accessible directories to alert on unauthorized file creation or modification
• Deploy network intrusion detection systems (IDS) with signatures for unrestricted file upload exploitation attempts

Monitoring Recommendations

• Enable detailed logging for all requests to JSP endpoints, particularly those handling file uploads
• Monitor web server directories for newly created executable files or files with double extensions
• Establish baseline traffic patterns and alert on anomalous spikes in file upload activity

How to Mitigate CVE-2026-4220

Immediate Actions Required

• Restrict network access to the /SetWebpagePic.jsp endpoint using firewall rules or access control lists
• If possible, disable or remove the vulnerable /SetWebpagePic.jsp file until a vendor patch is available
• Implement strict input validation for the targetPath and Suffix parameters at the application or WAF level
• Review web server directories for any unauthorized files that may have been uploaded

Patch Information

No vendor patch is currently available. The vendor was contacted early about this disclosure but did not respond in any way. Organizations should monitor vendor communications for future security updates. Additional technical details are available through VulDB #351144 and the associated VulDB CTI entry.

Workarounds

• Deploy a Web Application Firewall (WAF) with rules to block requests containing suspicious path traversal sequences or dangerous file extensions in upload parameters
• Implement network segmentation to limit access to the affected platform from untrusted networks
• Configure file system permissions to prevent the web server from writing executable files to web-accessible directories
• Use application-level access controls to restrict the vulnerable endpoint to authenticated and authorized users only

# Example WAF rule to block suspicious requests to the vulnerable endpoint
# Block requests to SetWebpagePic.jsp with path traversal patterns
SecRule REQUEST_URI "@contains /SetWebpagePic.jsp" \
    "id:1001,phase:2,deny,status:403,\
    chain,msg:'Potential file upload attack blocked'"
SecRule ARGS:targetPath "@rx \.\./" "chain"
SecRule ARGS:Suffix "@rx \.(jsp|php|exe|sh|bat)$"