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CVE-2021-36742

63
FAUCET Score

CVE-2021-36742 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. With a CVSS score of 7.8 (High), this vulnerability allows a local attacker with low-privileged code execution to escalate privileges, leading to high impact on confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, as confirmed by its presence in the KEV catalog and media coverage, despite no public exploit code being available in Metasploit, Nuclei, or ExploitDB. Community discussion and media attention indicate significant awareness of this threat.

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

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.48%
Probability of exploitation in next 30 days
EPSS Percentile
71.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Added to KEV · Nov 3, 2021
This CVE's current EPSS score of 0.0148 is in the 95th percentile among its peer group of 16,994 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.3 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
Vendor Advisory
success.trendmicro.com / jp/solution/000287815
Vendor Advisory
success.trendmicro.com / solution/000287819
Vendor Advisory
success.trendmicro.com / solution/000287820
Vendor Advisory