CVE-2021-32464

SYSTEM code execution via writable service resource

Published Aug 4, 2021 · Updated Aug 3, 2024

Incorrect permissions in Trend Micro Apex One 2019 and Worry-Free Business Security Services 6.7 allow local users to gain SYSTEM privileges. The Worry-Free Business Services Agent assigns incorrect permissions to a service resource, allowing its script to be modified before SYSTEM execution. Exploitation requires prior low-privileged code execution on a Windows endpoint and results in arbitrary code execution as SYSTEM.

CVSS severity7.8
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect permissions in Trend Micro Apex One 2019 and Worry-Free Business Security Services 6.7 allow local users to gain SYSTEM privileges. The Worry-Free Business Services Agent assigns incorrect permissions to a service resource, allowing its script to be modified before SYSTEM execution. Exploitation requires prior low-privileged code execution on a Windows endpoint and results in arbitrary code execution as SYSTEM.

The record

CVE
CVE-2021-32464
Published
Aug 4, 2021
Updated
Aug 3, 2024
Vendor
Trend Micro
Product
Trend Micro Worry-Free Business Security
Classifications
CWE-276, T1574.010
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Services (SaaS)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Trend Micro · Trend Micro Worry-Free Business Securityversion=Services (SaaS)
Trend Micro · Trend Micro Apex Oneversion=2019, SaaS

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Trend MicroCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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No observations available

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

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1574.010Services File Permissions Weakness

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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