CVE-2025-49217 in Endpoint Encryption
Summary
by MITRE • 06/18/2025
An insecure deserialization operation in the Trend Micro Endpoint Encryption PolicyServer could lead to a pre-authentication remote code execution on affected installations. Note that this vulnerability is similar to CVE-2025-49213 but is in a different method.
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Analysis
by VulDB Data Team • 09/09/2025
The vulnerability identified as CVE-2025-49217 represents a critical security flaw within Trend Micro Endpoint Encryption PolicyServer that exposes systems to remote code execution attacks without requiring authentication. This issue stems from insecure deserialization practices that allow attackers to manipulate serialized data objects during transmission or storage processes. The vulnerability specifically affects the PolicyServer component of Trend Micro's endpoint encryption solution, which serves as a central management system for encryption policies and configurations across enterprise environments. Security researchers have noted that while this vulnerability shares similarities with CVE-2025-49213, it manifests through a distinct code path or method within the software architecture, making it a separate but equally dangerous threat vector.
The technical implementation of this vulnerability involves the PolicyServer's handling of serialized data structures that are typically used for transferring configuration information between system components. When the server processes these serialized objects without proper validation or sanitization, malicious actors can inject crafted payloads that execute arbitrary code within the server's execution context. This deserialization flaw falls under the CWE-502 category, specifically addressing "Deserialization of Untrusted Data" which is a well-documented weakness in software security practices. The vulnerability's pre-authentication nature means that attackers can exploit it from any network location without requiring valid credentials, significantly expanding the attack surface and reducing the barriers to successful exploitation.
The operational impact of CVE-2025-49217 extends beyond simple remote code execution, as it can potentially enable attackers to gain complete control over the affected PolicyServer instance. This control allows for privilege escalation, data exfiltration, and the ability to manipulate encryption policies across the entire endpoint encryption infrastructure. The compromised server could serve as a pivot point for lateral movement within the enterprise network, potentially affecting other systems that rely on the encryption policies managed by the vulnerable component. Organizations using Trend Micro Endpoint Encryption solutions may face significant data exposure risks, as the attacker could potentially decrypt or manipulate encrypted data stored within the system. This vulnerability directly aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: Python" and T1566.001 for "Phishing: Spearphishing Attachment" when considering how attackers might leverage the compromised system to further their objectives.
Mitigation strategies for CVE-2025-49217 should prioritize immediate patching of affected Trend Micro Endpoint Encryption installations through official security updates provided by the vendor. Organizations should implement network segmentation to limit access to the PolicyServer component and consider disabling unnecessary services or ports that might expose the vulnerable deserialization functionality. Security monitoring should include detection of unusual deserialization patterns or suspicious data transfers that could indicate exploitation attempts. Additionally, organizations should conduct thorough security assessments of their endpoint encryption infrastructure to identify any other potential insecure deserialization vulnerabilities. The vulnerability demonstrates the critical importance of input validation and secure coding practices, particularly when handling serialized data objects that originate from untrusted sources. Organizations should also review their incident response procedures to ensure readiness for potential exploitation of this class of vulnerability, as the pre-authentication nature means that attacks can occur without prior detection or warning.