How severe is CVE-2019-18191?

CVE-2019-18191 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-18191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18191?

CVE-2019-18191 affects Trendmicro Deep Security As A Service. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18191?

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

When was CVE-2019-18191 published?

CVE-2019-18191 was published on 2019-12-16 and last updated on 2026-06-17.

CVE-2019-18191

CVE-2019-18191 is a high-severity vulnerability in Trendmicro Deep Security As A Service with a CVSS 3.x base score of 8.8. 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-459.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-459
Affected product: Trendmicro Deep Security As A Service
Published: 2019-12-16
Last modified: 2026-06-17

Description

A privilege escalation vulnerability in the Trend Micro Deep Security as a Service Quick Setup cloud formation template could allow an authenticated entity with certain unrestricted AWS execution privileges to escalate to full privileges within the target AWS account.

Frequently asked questions

What is CVE-2019-18191?: A privilege escalation vulnerability in the Trend Micro Deep Security as a Service Quick Setup cloud formation template could allow an authenticated entity with certain unrestricted AWS execution privileges to escalate to full privileges within the target AWS account.
How severe is CVE-2019-18191?: CVE-2019-18191 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-18191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18191?: CVE-2019-18191 affects Trendmicro Deep Security As A Service. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-18191 published?: CVE-2019-18191 was published on 2019-12-16 and last updated on 2026-06-17.

References

https://success.trendmicro.com/solution/000157758

Affected products (1)

cpe:2.3:a:trendmicro:deep_security_as_a_service:-:*:*:*:*:*:*:*

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