CVE-2021-44020

Local privilege escalation via unnecessary privileges

Published Dec 3, 2021 · Updated Aug 4, 2024

An unnecessary privilege vulnerability in Trend Micro Worry-Free Business Security 10.0 SP1 allows local attackers to escalate privileges. The affected component and exact operation are not publicly disclosed; Trend Micro characterizes the flaw as an unnecessary privilege condition. Exploitation requires prior ability to execute low-privileged code on the Windows host, with potential elevation to higher privileges.

CVSS severity7.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An unnecessary privilege vulnerability in Trend Micro Worry-Free Business Security 10.0 SP1 allows local attackers to escalate privileges. The affected component and exact operation are not publicly disclosed; Trend Micro characterizes the flaw as an unnecessary privilege condition. Exploitation requires prior ability to execute low-privileged code on the Windows host, with potential elevation to higher privileges.

The record

CVE
CVE-2021-44020
Published
Dec 3, 2021
Updated
Aug 4, 2024
Vendor
Trend Micro
Product
Trend Micro Worry-Free Business Security
Classifications
CWE-269, T1548
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

  1. Affected versionversion=10.0 SP1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Trend Micro · Trend Micro Worry-Free Business Securityversion=10.0 SP1

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2NVDAV:L/AC:L/Au:N/C:C/I:C/A:C

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-269Improper Privilege Management
T1548Abuse Elevation Control Mechanism

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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