Unauthenticated arbitrary file write via directory traversal
Published Mar 18, 2020 · Updated Oct 21, 2025
Path traversal in Trend Micro Apex One 2019 and OfficeScan XG allows remote attackers to write arbitrary data anywhere on the server. A server EXE accepts a file-upload path without confining it to the intended directory, so traversal sequences redirect attacker-controlled content to an arbitrary path. No authentication is required, and a successful write bypasses ROOT login and can alter any writable server location.
Summary
What happened
Path traversal in Trend Micro Apex One 2019 and OfficeScan XG allows remote attackers to write arbitrary data anywhere on the server. A server EXE accepts a file-upload path without confining it to the intended directory, so traversal sequences redirect attacker-controlled content to an arbitrary path. No authentication is required, and a successful write bypasses ROOT login and can alter any writable server location.
The record
- CVE
- CVE-2020-8599
- Published
- Mar 18, 2020
- Updated
- Oct 21, 2025
- Vendor
- Trend Micro
- Product
- Trend Micro Apex One
- Classifications
- T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 18, 2020CVE publishedPublication date reported by the CVE source.
- Nov 3, 2021Exploitation reportedCISA Known Exploited Vulnerabilities catalog listing
- 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=OfficeScan XG (12.0), Apex One 2019 (14.0)
What conditions does exploitation require?
What is affected?
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
Technologies
Your stack
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Your stack
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