EUVD-2025-28284CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Description
An insecure deserialization operation in the Trend Micro Endpoint Encryption PolicyServer could lead to a post-authentication remote code execution on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system to exploit this vulnerability.
Analysis
Post-authentication insecure deserialization vulnerability in Trend Micro Endpoint Encryption PolicyServer that allows remote code execution with high impact on confidentiality, integrity, and availability. While the CVSS score of 8.8 is significant, exploitation requires prior low-privileged code execution on the target system, substantially reducing real-world attack surface compared to unauthenticated network exploits. The vulnerability affects Trend Micro Endpoint Encryption installations and should be prioritized based on organizational exposure to this specific product line and internal threat modeling of low-privileged account compromise scenarios.
Technical Context
This vulnerability exists in the deserialization handling mechanisms of Trend Micro Endpoint Encryption PolicyServer, which processes untrusted serialized objects without proper validation. CWE-477 (Use of Obsolete Function) indicates the root cause involves deprecated or inherently unsafe deserialization functions. The PolicyServer component is responsible for managing encryption policies across endpoints and likely uses Java or .NET serialization frameworks (common in enterprise management tools). The insecure deserialization pattern allows an authenticated attacker to inject malicious serialized payloads that execute arbitrary code during object reconstruction. Trend Micro Endpoint Encryption is designed for data-at-rest and data-in-transit protection; the PolicyServer is the centralized management interface that would typically run on dedicated infrastructure with network isolation.
Affected Products
Trend Micro Endpoint Encryption PolicyServer (specific version numbers not provided in available data; vendor advisories should be consulted for exact version ranges affected). CPE data would typically follow pattern: cpe:2.3:a:trendmicro:endpoint_encryption:*:*:*:*:*:*:*:*. Organizations should cross-reference their installed Endpoint Encryption version against Trend Micro's official security advisory for CVE-2025-49214 to determine if their deployment is vulnerable. Related product lines (Trend Micro Maximum Security, Trend Micro Cloud One) that may bundle Endpoint Encryption should also be assessed.
Remediation
1) Immediately apply security patches released by Trend Micro for CVE-2025-49214 to affected PolicyServer instances. 2) Implement network segmentation to restrict PolicyServer access to only authorized management subnets and administrative endpoints. 3) Enforce strong authentication (multi-factor authentication) for PolicyServer administrative access to prevent low-privileged account compromise that could serve as attack prerequisite. 4) Monitor PolicyServer logs and process execution for suspicious deserialization activity or unexpected code execution patterns. 5) Isolate PolicyServer on separate VLAN with intrusion detection/prevention systems configured to detect anomalous serialized object payloads. 6) Review and revoke unnecessary low-privileged service accounts with PolicyServer access. Consult Trend Micro's official security advisory page and patch management portal for specific version numbers and automated patching procedures.
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