Local privilege escalation via undisclosed input validation
Published Jul 29, 2021 · Updated Oct 21, 2025
Improper input validation in Trend Micro Apex One, OfficeScan XG, and Worry-Free Business Security allows local users to gain privileges. Trend Micro has not published the affected component, accepted input, or incorrect validation operation, leaving the code-level mechanism undisclosed. Exploitation requires low-privileged code execution on a Windows host and yields elevated privileges that can compromise the host.
Summary
What happened
Improper input validation in Trend Micro Apex One, OfficeScan XG, and Worry-Free Business Security allows local users to gain privileges. Trend Micro has not published the affected component, accepted input, or incorrect validation operation, leaving the code-level mechanism undisclosed. Exploitation requires low-privileged code execution on a Windows host and yields elevated privileges that can compromise the host.
The record
- CVE
- CVE-2021-36742
- Published
- Jul 29, 2021
- Updated
- Oct 21, 2025
- Vendor
- Trend Micro
- Product
- Trend Micro Worry-Free Business Security
- Classifications
- CWE-20, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 29, 2021CVE publishedPublication date reported by the CVE source.
- Oct 21, 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.
- Affected versionversion=10.0 SP1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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.
Reported exploitation
- CISA Known Exploited Vulnerabilities catalog listingknown exploited catalog
Technologies
Your stack
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Your stack
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