How severe is CVE-2020-8598?

CVE-2020-8598 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8598 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8598?

CVE-2020-8598 primarily affects Trendmicro Apex One. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8598?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-8598 published?

CVE-2020-8598 was published on 2020-03-18 and last updated on 2026-06-17.

CVE-2020-8598

CVE-2020-8598 is a critical-severity vulnerability in Trendmicro Apex One with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Trendmicro Apex One
Published: 2020-03-18
Last modified: 2026-06-17

Description

Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) server contains a vulnerable service DLL file that could allow a remote attacker to execute arbitrary code on affected installations with SYSTEM level privileges. Authentication is not required to exploit this vulnerability.

Frequently asked questions

What is CVE-2020-8598?: Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) server contains a vulnerable service DLL file that could allow a remote attacker to execute arbitrary code on affected installations with SYSTEM level privileges. Authentication is not required to exploit this vulnerability.
How severe is CVE-2020-8598?: CVE-2020-8598 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8598 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8598?: CVE-2020-8598 primarily affects Trendmicro Apex One. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8598?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-8598 published?: CVE-2020-8598 was published on 2020-03-18 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:officescan:xg:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:9.0:sp3:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:9.5:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:10.0:-:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:10.0:sp1:*:*:*:*:*:*

More vulnerabilities in Trendmicro Apex One

CVE-2025-71211 — Critical (CVSS 9.8): A vulnerability in the Trend Micro Apex One management console could allow a remote attacker to upload malicious code…
CVE-2025-71210 — Critical (CVSS 9.8): A vulnerability in the Trend Micro Apex One management console could allow a remote attacker to upload malicious code…
CVE-2023-32557 — Critical (CVSS 9.8): A path traversal vulnerability in the Trend Micro Apex One and Apex One as a Service could allow an unauthenticated…
CVE-2023-25143 — Critical (CVSS 9.8): An uncontrolled search path element vulnerability in the Trend Micro Apex One Server installer could allow an attacker…
CVE-2022-40144 — Critical (CVSS 9.8): A vulnerability in Trend Micro Apex One and Trend Micro Apex One as a Service could allow an attacker to bypass the…
CVE-2022-26871 — Critical (CVSS 9.8): An arbitrary file upload vulnerability in Trend Micro Apex Central could allow an unauthenticated remote attacker to…

All CVEs affecting Trendmicro Apex One →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

CVE-2026-54309 — Critical (CVSS 10.0): n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP…
CVE-2026-50242 — Critical (CVSS 10.0): In JetBrains Hub before 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429…
CVE-2026-49257 — Critical (CVSS 10.0): mcp-pinot is a Python-based Model Context Protocol (MCP) server for interacting with Apache Pinot. In versions 3.0.1…
CVE-2026-46846 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46803 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Security Framework).…
CVE-2026-46800 — Critical (CVSS 10.0): Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites).…

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →