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CVE-2021-36742

Trend Micro Multiple Products Improper Input Validation

7.8 HIGHActively exploited (CISA KEV)EPSS 1.48%
  1. Published29 Jul 2021
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due17 Nov 2021
Actively exploited (CISA KEV)

Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security contain an improper input validation vulnerability that allows for privilege escalation.

Added to KEV: 3 Nov 2021Federal remediation due: 17 Nov 2021

Description

A improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service, OfficeScan XG and Worry-Free Business Security 10.0 SP1 allows a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

CVSS 3.1 breakdown

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

Affected products

Trend Micro Apex One2019
Trend Micro Officescan Business Security10.0
Trend Micro Officescanxg
Trend Micro Worry-free Business Security10.0

Remediation

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

References

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Frequently asked

Is CVE-2021-36742 being actively exploited?

Yes. CVE-2021-36742 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2021-36742?

CVE-2021-36742 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 1.48% probability of exploitation.

Which products are affected by CVE-2021-36742?

Affected products include Trend Micro Apex One, Trend Micro Officescan Business Security, Trend Micro Officescan, Trend Micro Worry-free Business Security.

How do I fix CVE-2021-36742?

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-2021-36742 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.