CVE-2020-8599

Name: CVE-2020-8599
Creator: NVD / NIST
Published: 2020-03-18T01:15:12.223+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 11.58%

Last modified Jun 17, 2026

CVE-2020-8599 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 11.58% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

11.58%

95.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Affected Software

Vendor	Product	Versions
Trendmicro	Apex One	2019
Trendmicro	Officescan	xg

References

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

Timeline

Published: Mar 18, 2020
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2020-8599?

How severe is CVE-2020-8599?

CVE-2020-8599 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 11.58% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2020-8599?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8599?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST