CVE-2021-25227

Scanning disablement via unvalidated iCoreService input

Published Feb 4, 2021 · Updated Aug 3, 2024

Memory exhaustion in Trend Micro Antivirus for Mac 2021 (v11) allows local users to disable all scanning via crafted input. The iCoreService executable fails to validate user-supplied data before processing it, allowing memory consumption to grow until scanning stops. Exploitation requires low-privileged code execution on the Mac and user interaction with a malicious page or file, and the reported consequence is loss of scanning rather than data access or modification.

CVSS severity3.3
Low
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in Trend Micro Antivirus for Mac 2021 (v11) allows local users to disable all scanning via crafted input. The iCoreService executable fails to validate user-supplied data before processing it, allowing memory consumption to grow until scanning stops. Exploitation requires low-privileged code execution on the Mac and user interaction with a malicious page or file, and the reported consequence is loss of scanning rather than data access or modification.

The record

CVE
CVE-2021-25227
Published
Feb 4, 2021
Updated
Aug 3, 2024
Vendor
Trend Micro
Product
Trend Micro Antivirus for Mac
Classifications
CWE-400, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 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=2021 (v11)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Trend Micro · Trend Micro Antivirus for Macversion=2021 (v11)

Published CVSS scores

1.9NIST NVDAV:L/AC:M/Au:N/C:N/I:N/A:P
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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