Critical

Pre-authentication RCE in Trend Micro Endpoint Encryption PolicyServer

IdentifiersCVE-2025-49212CWE-502· Deserialization of Untrusted Data

CVE-2025-49212 is a critical insecure deserialization vulnerability in Trend Micro Endpoint Encryption PolicyServer. The flaw is associated with missing input validation in the PolicyValueTableSerializationBinder class, allowing attacker-controlled serialized input to be processed unsafely. A remote, unauthenticated attacker can send specially crafted input that triggers deserialization of malicious data and results in code execution before authentication. The issue is described as similar to CVE-2025-49220, but occurring in a different method within the affected product.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can lead to pre-authentication remote code execution on affected Endpoint Encryption PolicyServer installations. Because exploitation does not require prior authentication, an external attacker may be able to execute arbitrary code in the context of the vulnerable service, potentially leading to full system compromise, unauthorized access, follow-on privilege escalation, lateral movement, and disruption of security operations.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of the PolicyServer service to untrusted networks, restrict access to trusted administrative paths only, and place the service behind network segmentation and access controls to limit unauthenticated reachability. Monitor for abnormal requests targeting PolicyServer deserialization paths and prioritize emergency maintenance because this is a pre-authentication RCE condition.

Remediation

Patch, then assume compromise.

Apply Trend Micro Endpoint Encryption PolicyServer Patch 1 Update 6 and upgrade affected installations to version 6.0.0.4013 or later. Systems older than 6.0.0.4013 without Patch 1 Update 6 are vulnerable and should be updated urgently.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Trend MicroEndpoint Encryption Policy Serverapplication

Trend MicroTrend Micro Endpoint Encryptionapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

7 SOURCESView more in app

scworldNews

Jun 19, 2025

Hacking Drivers – PSW #879

A Trend Micro Endpoint Encryption (TMEE) PolicyServer pre-auth remote code execution vector caused by insecure deserialization.

csirt skNews

Jun 13, 2025

Kritické zraniteľnosti v Trend Micro Apex Central a Endpoint Encryption PolicyServer | CSIRT.SK

Critical remote code execution vulnerability in Trend Micro Endpoint Encryption PolicyServer caused by improper input validation in PolicyValueTableSerializationBinder leading to unsafe deserialization.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5