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CVE-2021-36741

67
FAUCET Score

CVE-2021-36741 is an improper input validation vulnerability affecting Trend Micro Apex One, Apex One as a Service, OfficeScan XG, and Worry-Free Business Security 10.0 SP1. This flaw allows an authenticated attacker to upload arbitrary files to the affected systems. With a CVSS score of 8.8 (High), this vulnerability is easily exploitable over the network with low complexity, leading to high impacts on confidentiality, integrity, and availability. Notably, this CVE is listed in CISA's KEV catalog, indicating active exploitation in the wild, despite a lack of public exploit code or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
xgCPE matchmatch criteria
cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:a:trendmicro:officescan_business_security:10.0:sp1:*:*:*:*:*:*
2019CPE matchmatch criteria
cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:a:trendmicro:worry-free_business_security:10.0:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.95%
Probability of exploitation in next 30 days
EPSS Percentile
91.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · Nov 3, 2021
This CVE's current EPSS score of 0.0495 is in the 91st percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
success.trendmicro.com / jp/solution/000287796
Broken LinkVendor Advisory
success.trendmicro.com / jp/solution/000287815
Broken LinkVendor Advisory
success.trendmicro.com / solution/000287819
Broken LinkVendor Advisory
success.trendmicro.com / solution/000287820
Broken LinkVendor Advisory