How severe is CVE-2021-43772?

CVE-2021-43772 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-43772 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43772?

CVE-2021-43772 primarily affects Trendmicro Antivirus+ Security. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-43772?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-43772 published?

CVE-2021-43772 was published on 2021-12-03 and last updated on 2026-06-17.

CVE-2021-43772

CVE-2021-43772 is a medium-severity vulnerability in Trendmicro Antivirus+ Security with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-552.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-552
Affected product: Trendmicro Antivirus+ Security
Published: 2021-12-03
Last modified: 2026-06-17

Description

Trend Micro Security 2021 v17.0 (Consumer) contains a vulnerability that allows files inside the protected folder to be modified without any detection.

Frequently asked questions

What is CVE-2021-43772?: Trend Micro Security 2021 v17.0 (Consumer) contains a vulnerability that allows files inside the protected folder to be modified without any detection.
How severe is CVE-2021-43772?: CVE-2021-43772 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-43772 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43772?: CVE-2021-43772 primarily affects Trendmicro Antivirus+ Security. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43772?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43772 published?: CVE-2021-43772 was published on 2021-12-03 and last updated on 2026-06-17.

References

https://helpcenter.trendmicro.com/en-us/article/tmka-10855

Affected products (4)

cpe:2.3:a:trendmicro:antivirus\+_security:*:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:internet_security:*:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:maximum_security:*:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:premium_security:*:*:*:*:*:*:*:*

Other CWE-552 (Files or Directories Accessible to External Parties) vulnerabilities

CVE-2025-41240 — Critical (CVSS 10.0): Three Bitnami Helm charts mount Kubernetes Secrets under a predictable path (/opt/bitnami/*/secrets) that is located…
CVE-2024-56731 — Critical (CVSS 10.0): Gogs is an open source self-hosted Git service. Prior to version 0.13.3, it's still possible to delete files under the…
CVE-2024-6209 — Critical (CVSS 10.0): Unauthorized file access in WEB Server in ABB ASPECT - Enterprise v3.08.01; NEXUS Series v3.08.01 ; MATRIX Series…
CVE-2025-14771 — Critical (CVSS 9.9): Files or directories accessible to external parties vulnerability in ABB T-MAC Plus. This issue affects T-MAC Plus:…
CVE-2024-39931 — Critical (CVSS 9.9): Gogs through 0.13.0 allows deletion of internal files.
CVE-2021-43821 — Critical (CVSS 9.9): Opencast is an Open Source Lecture Capture & Video Management for Education. Opencast before version 9.10 or 10.6…

Browse all CWE-552 (Files or Directories Accessible to External Parties) vulnerabilities →