CVE-2021-44023

A link following denial-of-service (DoS) vulnerability in the Trend Micro Security (Consumer) 2021 familiy of products could allow an attacker to abuse the PC Health Checkup feature of the product to create symlinks that would allow modification of files which could lead to a denial-of-service.

Published: 2021-12-15 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44023 is rated Low Risk (39.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.41%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-44023

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.21% 0.41% +0.20%
2 2025-03-17 0.06% 0.21% +0.15%
3 2023-07-08 — 0.06% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44023

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.2 [email protected]
3.6 2.0 LOW
AV:L/AC:L/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 4.9 [email protected]

Weakness enumeration for CVE-2021-44023

Affected software / configurations for CVE-2021-44023

Vendor Product Version Raw CPE
trendmicro antivirus\+_security_2021 <= 17.0 cpe:2.3:a:trendmicro:antivirus\+_security_2021:*:*:*:*:*:*:*:*
trendmicro internet_security_2021 <= 17.0 cpe:2.3:a:trendmicro:internet_security_2021:*:*:*:*:*:*:*:*
trendmicro maximum_security_2021 <= 17.0 cpe:2.3:a:trendmicro:maximum_security_2021:*:*:*:*:*:*:*:*
trendmicro premium_security_2021 <= 17.0 cpe:2.3:a:trendmicro:premium_security_2021:*:*:*:*:*:*:*:*

References for CVE-2021-44023

cvelogic Threat Intelligence