CVE-2026-10071 Overview
CVE-2026-10071 is an arbitrary file upload vulnerability in DreamMaker, developed by Interinfo. The flaw allows unauthenticated remote attackers to upload web shell backdoors to the server. Once uploaded, attackers can execute these shells to achieve arbitrary code execution in the application context. The weakness is categorized under [CWE-434] Unrestricted Upload of File with Dangerous Type. No authentication or user interaction is required to exploit the issue, making it reachable directly over the network.
Critical Impact
Unauthenticated attackers can deploy web shells and execute arbitrary code on affected DreamMaker servers, leading to full system compromise.
Affected Products
- Interinfo DreamMaker (vendor-confirmed affected; specific version range not published in NVD)
- Refer to the TWCert Security Advisory for vendor-published version details
- Refer to the TWCert Incident Report for additional product context
Discovery Timeline
- 2026-05-29 - CVE-2026-10071 published to NVD
- 2026-05-29 - Last updated in NVD database
Technical Details for CVE-2026-10071
Vulnerability Analysis
The vulnerability resides in a file upload handler in DreamMaker that fails to validate uploaded content. The application accepts files without enforcing restrictions on file extensions, MIME types, or executable content. Attackers can submit server-side script files such as web shells through the upload endpoint. Because the upload path is reachable without authentication, anyone with network access to the application can deliver a payload. Once written to a directory served by the web tier, the file becomes executable through a direct HTTP request, granting interactive command execution.
Root Cause
The root cause is improper validation of file uploads, classified under [CWE-434]. The handler trusts client-supplied filenames and content types instead of enforcing a server-side allowlist. There is no separation between an upload directory and an executable web directory, and no content inspection prevents script files from being stored.
Attack Vector
Exploitation occurs over the network with no privileges and no user interaction. An attacker sends a crafted HTTP POST request to the vulnerable upload endpoint containing a web shell payload. After the file is stored on disk, the attacker issues a follow-up HTTP request to the uploaded file's URL. The web server executes the shell, returning command output and providing persistent backdoor access. The vulnerability mechanism is described in the TWCert Security Advisory; no public proof-of-concept code is currently referenced in the NVD record.
Detection Methods for CVE-2026-10071
Indicators of Compromise
- Unexpected script files (.jsp, .aspx, .php, .ashx) appearing in DreamMaker upload or web-accessible directories
- HTTP POST requests to file upload endpoints originating from untrusted source addresses without prior authentication
- Outbound network connections initiated from the DreamMaker application process to attacker-controlled hosts
- Web server process spawning command interpreters such as cmd.exe, powershell.exe, or /bin/sh
Detection Strategies
- Inspect web server access logs for POST requests to upload handlers followed by GET requests to newly created files with executable extensions
- Hash and inventory files in writable web directories, then alert on new entries that match script signatures
- Apply web application firewall rules that block uploads containing script headers, shell function calls, or known web shell strings
- Monitor process lineage for the DreamMaker service account spawning shell or scripting interpreters
Monitoring Recommendations
- Forward DreamMaker application logs, IIS or web server logs, and host process telemetry to a central analytics platform for correlation
- Establish a baseline of files in upload directories and alert on deviations in count, extension, or hash
- Track egress traffic from the DreamMaker host and flag connections to non-business destinations or known C2 infrastructure
How to Mitigate CVE-2026-10071
Immediate Actions Required
- Restrict network access to the DreamMaker application using firewall rules or a reverse proxy until a vendor patch is applied
- Contact Interinfo and apply the fixed version referenced in the TWCert Security Advisory
- Review upload directories for unauthorized script files and remove any web shells discovered
- Rotate credentials and secrets accessible from the DreamMaker host, assuming potential compromise
Patch Information
Interinfo has published remediation guidance through TWCert. Administrators should consult the TWCert Security Advisory for the fixed build identifier and upgrade procedure. No specific patch hash or version string is included in the NVD record at the time of publication.
Workarounds
- Place the upload directory outside the web root or configure the web server to deny script execution in that path
- Enforce server-side validation that restricts uploads to an explicit allowlist of non-executable file types
- Require authentication on all upload endpoints and apply rate limiting to deter automated exploitation
- Deploy a web application firewall rule that blocks multipart uploads containing script tags or web shell signatures
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
