CVE-2026-24729 is a critical security vulnerability classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) affecting Internet Information Co., Ltd's DreamMaker software versions prior to 2025/10/22. The vulnerability arises from insufficient validation or restriction on file types during the upload process, allowing attackers to upload malicious Java class files. These class files can then be executed on the server, enabling remote code execution (RCE) without any authentication or user interaction. The vulnerability is remotely exploitable over the network (AV:N), requires no privileges (PR:N), and no user interaction (UI:N), making it highly accessible to attackers. The CVSS 4.0 vector indicates a maximum score of 10.0, reflecting critical impact on confidentiality, integrity, and availability (all rated high). This means attackers can fully compromise affected systems, steal sensitive data, alter or destroy information, and disrupt services. The vulnerability is particularly dangerous because it allows direct command execution on the underlying system, potentially leading to full system takeover. No patches or official fixes are currently linked, and no known exploits have been reported in the wild, but the risk remains urgent due to the straightforward exploitation method. DreamMaker is used in various enterprise environments, and this vulnerability could be leveraged for espionage, sabotage, or ransomware deployment.

For European organizations, the impact of CVE-2026-24729 is severe. Successful exploitation can lead to complete system compromise, data breaches, service outages, and potential lateral movement within networks. Organizations in sectors such as finance, healthcare, government, and critical infrastructure are particularly vulnerable due to the sensitive nature of their data and operations. The ability to execute arbitrary commands remotely without authentication increases the likelihood of widespread attacks, including ransomware or espionage campaigns targeting European entities. Disruption of services could affect business continuity and regulatory compliance, especially under GDPR and other data protection laws. The vulnerability could also be exploited to establish persistent backdoors, enabling long-term unauthorized access. Given the critical severity and ease of exploitation, European organizations using DreamMaker must prioritize mitigation to avoid significant operational and reputational damage.

1. Immediate upgrade to DreamMaker version 2025/10/22 or later once available to apply official patches addressing the vulnerability. 2. If patches are not yet available, implement strict file upload restrictions by configuring web application firewalls (WAFs) to block uploads of executable or class files. 3. Employ input validation and sanitization on the server side to restrict allowed file types and enforce content-type checks. 4. Use network segmentation to isolate DreamMaker servers from critical internal systems to limit lateral movement in case of compromise. 5. Monitor logs and network traffic for unusual file upload activity or execution of unexpected commands. 6. Employ intrusion detection/prevention systems (IDS/IPS) with signatures targeting malicious class file uploads. 7. Conduct regular security audits and penetration testing focused on file upload functionalities. 8. Educate administrators and developers on secure file handling practices and the risks of unrestricted uploads. 9. Implement application-level authentication and authorization controls to restrict access to upload functionalities where possible. 10. Maintain up-to-date backups and incident response plans to quickly recover from potential compromises.