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CVE-2021-36741

Published: Jul 29, 2021Updated: Oct 31, 2025 Sources: CVE List NVD BDUCWE-434
NVD MITRE
8.8CVSSHIGH
EPSS Score
5.0%
Top 8.9%
CISA KEV
Active Exploitation
Since Nov 3, 2021
Exploits
No Known Exploits
Remediation
Patch Available

Description

An 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 remote attached to upload arbitrary files on affected installations. Please note: an attacker must first obtain the ability to logon to the product�s management console in order to exploit this vulnerability.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-434

Affected Products

Trend Micro Apex OneTrend MicroSecurity Products
Trend Micro OfficeScanTrend MicroSecurity Products
Trend Micro Worry-Free Business SecurityTrend MicroSecurity Products
Apex OneTrend MicroSecurity Products
Worry-Free Business SecurityTrend MicroSecurity Products
trend microcommercialJPSecurity Productsaka trendmicro
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Nov 3, 2021
Remediation due:Nov 17, 2021

Required action: Apply updates per vendor instructions.

Official Patch Available

MITRE ATT&CK

3 techniques
Command and Control
Initial Access
Persistence
View detailed technique mapping

References

https://success.trendmicro.com/solution/000287819
success.trendmicro.com
https://success.trendmicro.com/solution/000287820
success.trendmicro.com
https://success.trendmicro.com/jp/solution/000287796
success.trendmicro.com
and 6 more references View all →

Timeline

Published
Jul 29, 2021
Added to CISA KEV
Nov 3, 2021
Last Updated
Oct 31, 2025

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