CVE-2020-8599: Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability

Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-1a52536e7904, updated 2026-11-02T23:39:54.475Z.

CISA Known Exploited Vulnerabilities

Name: Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability
Vendor: Trend Micro
Product: Apex One and OfficeScan
Added to the catalog: 2021-11-03
Due date for US federal agencies: 2022-05-03
Catalog version: 2026.10.30

Trend Micro Apex One and OfficeScan server contain a vulnerable EXE file that could allow a remote attacker to write data to a path on affected installations and bypass root login.

Required action (CISA)

Apply updates per vendor instructions.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

https://nvd.nist.gov/vuln/detail/CVE-2020-8599

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status: Analyzed
Published: 2020-03-18T01:15:12.223
Last modified: 2026-06-17T03:26:37.310
Weaknesses: NVD-CWE-noinfo

Trend Micro Apex One (2019) and OfficeScan XG server contain a vulnerable EXE file that could allow a remote attacker to write arbitrary data to an arbitrary path on affected installations and bypass ROOT login. Authentication is not required to exploit this vulnerability.

Metric	Score	Severity	Vector	Scored by
CVSS 3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	[email protected] (Primary)
CVSS 3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CVSS 2.0	10	HIGH	AV:N/AC:L/Au:N/C:C/I:C/A:C	[email protected] (Primary)

References

https://success.trendmicro.com/jp/solution/000244253 (Broken Link, Patch, Vendor Advisory)
https://success.trendmicro.com/solution/000245571 (Broken Link, Patch, Vendor Advisory)
https://success.trendmicro.com/jp/solution/000244253 (Broken Link, Patch, Vendor Advisory)
https://success.trendmicro.com/solution/000245571 (Broken Link, Patch, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8599 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:43.468Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-8599

CVE record

Assigner: trendmicro
State: PUBLISHED
Published: 2020-03-18T00:30:44.000Z
Updated: 2025-10-21T23:35:47.710Z
Problem types: Arbitrary File Upload Directory Traversal

References

Read on 2026-11-03T01:05:11.161Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2020/8xxx/CVE-2020-8599.json

Sources and licences

CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
CC0 1.0 Universal
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
CVE Program Terms of Use ("CVE Usage" licence)

Cite this page

Dragons Eye Ransomware Tracker, "CVE-2020-8599: Trend Micro Apex One and OfficeScan Authentication Bypass Vulnerability",
entity page, dataset version ref-1a52536e7904, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2020-8599 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-17T03:26:37.310.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-21T23:35:47.710Z.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.

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