How severe is CVE-2019-18189?

CVE-2019-18189 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-2019-18189 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18189?

CVE-2019-18189 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-2019-18189?

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-2019-18189 published?

CVE-2019-18189 was published on 2019-10-28 and last updated on 2026-06-17.

CVE-2019-18189

CVE-2019-18189 is a critical-severity vulnerability in Trendmicro Apex One with a CVSS 3.x base score of 9.8. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 5% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Trendmicro Apex One
Published: 2019-10-28
Last modified: 2026-06-17

Description

A directory traversal vulnerability in Trend Micro Apex One, OfficeScan (11.0, XG) and Worry-Free Business Security (9.5, 10.0) may allow an attacker to bypass authentication and log on to an affected product's management console as a root user. The vulnerability does not require authentication.

Frequently asked questions

What is CVE-2019-18189?: A directory traversal vulnerability in Trend Micro Apex One, OfficeScan (11.0, XG) and Worry-Free Business Security (9.5, 10.0) may allow an attacker to bypass authentication and log on to an affected product's management console as a root user. The vulnerability does not require authentication.
How severe is CVE-2019-18189?: CVE-2019-18189 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-2019-18189 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18189?: CVE-2019-18189 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-2019-18189?: 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-2019-18189 published?: CVE-2019-18189 was published on 2019-10-28 and last updated on 2026-06-17.

References

https://success.trendmicro.com/solution/000151732

Affected products (7)

cpe:2.3:a:trendmicro:apex_one:*:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:officescan:11.0:sp1:*:*:*:*:*:*
cpe:2.3:a:trendmicro:officescan:xg:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:9.5:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:10.0:*:*:*:*:*:*:*
cpe:2.3:a:trendmicro:worry-free_business_security:10.0:sp1:*:*:*:*:*:*

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