Authenticated arbitrary file upload
Published Jul 29, 2021 · Updated Oct 21, 2025
Arbitrary file upload in affected Trend Micro endpoint products allows remote authenticated users to write files through the management console. Trend Micro identifies improper input validation but has not published the affected upload handler or how it fails to constrain file names, paths, or types. Access to the management console is required; a successful upload can alter server files, and Trend Micro observed the flaw used with a local privilege-escalation flaw.
Summary
What happened
Arbitrary file upload in affected Trend Micro endpoint products allows remote authenticated users to write files through the management console. Trend Micro identifies improper input validation but has not published the affected upload handler or how it fails to constrain file names, paths, or types. Access to the management console is required; a successful upload can alter server files, and Trend Micro observed the flaw used with a local privilege-escalation flaw.
The record
- CVE
- CVE-2021-36741
- Published
- Jul 29, 2021
- Updated
- Oct 21, 2025
- Vendor
- Trend Micro
- Product
- Trend Micro Worry-Free Business Security
- Classifications
- CWE-434, T1190
- Attack vector
- network
- 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.
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Reported exploitation
- CISA Known Exploited Vulnerabilities catalog listingknown exploited catalog
- Trend Micro observed chained exploitation attemptsexploit chain
Technologies
Your stack
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Your stack
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