CVE-2025-53378Network attack vector

Agent hijacking via unauthenticated activation API

Published Jul 10, 2025 · Updated Jul 10, 2025

Missing authentication in Trend Micro Worry-Free Business Security Services SaaS agents allows remote attackers to hijack security agents. The agent activation API grants access to activation functionality without authenticating the request, enabling protection removal or a denial-of-service condition. Exploitation generally requires a user to visit a malicious page or open a malicious file; only Windows SaaS agents before 6.7.3954 / 14.3.1299 are affected.

CVSS severity7.6
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Trend Micro Worry-Free Business Security Services SaaS agents allows remote attackers to hijack security agents. The agent activation API grants access to activation functionality without authenticating the request, enabling protection removal or a denial-of-service condition. Exploitation generally requires a user to visit a malicious page or open a malicious file; only Windows SaaS agents before 6.7.3954 / 14.3.1299 are affected.

The record

CVE
CVE-2025-53378
Published
Jul 10, 2025
Updated
Jul 10, 2025
Vendor
Trend Micro
Product
Trend Micro Worry-Free Business Security Services
Classifications
CWE-306, T1204, T1562.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=SaaS <6.7.3954 / 14.3.1299

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Trend Micro · Trend Micro Worry-Free Business Security Servicesversion=SaaS <6.7.3954 / 14.3.1299

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.6Trend Micro, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1204User Execution
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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