CVE-2021-25251

Protection disablement via undisclosed code injection

Published Feb 10, 2021 · Updated Aug 3, 2024

Code injection in Trend Micro Security 2020 and 2021 allows local users to disable password protection and endpoint protection. Trend Micro has not published the affected component, the accepted input, or the code-generation operation that mishandles it. Exploitation requires existing administrator privileges on the computer, and the bounded consequence is impairment of the product's protections.

CVSS severity8.2
High
EPSS probability2.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Trend Micro Security 2020 and 2021 allows local users to disable password protection and endpoint protection. Trend Micro has not published the affected component, the accepted input, or the code-generation operation that mishandles it. Exploitation requires existing administrator privileges on the computer, and the bounded consequence is impairment of the product's protections.

The record

CVE
CVE-2021-25251
Published
Feb 10, 2021
Updated
Aug 3, 2024
Vendor
Trend Micro
Product
Trend Micro Security (Consumer)
Classifications
CWE-94, T1562.001
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 10, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2020 (v16), 2021 (v17)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Trend Micro · Trend Micro Security (Consumer)version=2020 (v16), 2021 (v17)

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.2JVNCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/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.

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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