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CVE-2020-8599

Trend Micro Apex One and OfficeScan Authentication Bypass

9.8 CRITICALActively exploited (CISA KEV)EPSS 11.9%
  1. Published18 Mar 2020
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

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.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Trend Micro Apex One2019
Trend Micro Officescanxg

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Frequently asked

Is CVE-2020-8599 being actively exploited?

Yes. CVE-2020-8599 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-8599?

CVE-2020-8599 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 11.9% probability of exploitation.

Which products are affected by CVE-2020-8599?

Affected products include Trend Micro Apex One, Trend Micro Officescan.

How do I fix CVE-2020-8599?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-8599 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.