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CVE-2021-42011

24
FAUCET Score

CVE-2021-42011 is an incorrect permission assignment vulnerability affecting Trend Micro Apex One and Apex One as a Service on Windows. This flaw allows a local attacker to achieve escalated privileges by loading a malicious DLL, but requires prior execution of low-privileged code on the target system. Rated as High severity (CVSS 7.8), it carries a significant impact on confidentiality, integrity, and availability. Currently, there is no public exploit code available, it is not listed on the KEV catalog, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2019CPE matchmatch criteria
cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:*
2019CPE matchmatch criteria
cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:saas:*:*:*

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
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 64th percentile among its peer group of 17,070 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

No media coverage found for this CVE.

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

success.trendmicro.com / solution/000289229
PatchVendor Advisory
zerodayinitiative.com / advisories/ZDI-21-1220
Third Party AdvisoryVDB Entry