What is CVE-2020-27019?

CVE-2020-27019 is a medium-severity vulnerability in Microsoft Windows, classified under Missing Authentication for Critical Function. CVSS score: 5.5/10. Published 2020-11-09.

How severe is CVE-2020-27019?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Auth bypass in Microsoft Windows

CVE-2020-27019

Trend Micro InterScan Messaging Security Virtual Appliance (IMSVA) 9.1 is vulnerable to an information disclosure vulnerability which could allow an attacker to access a specific database and key.

Vulnerability class: Broken Authentication

Published 2020-11-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.179 (97.1th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.181 · newest: 0.179 · change: -0.001

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

success.trendmicro.com/solution/000279833 (Exploit, Vendor Advisory)
sec-consult.com/en/blog/advisories/vulnerabilities-in-trend-micro-interscan-mes… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-27019?: CVE-2020-27019 is a medium-severity vulnerability in Microsoft Windows, classified under Missing Authentication for Critical Function. CVSS score: 5.5/10. Published 2020-11-09.
How severe is CVE-2020-27019?: Medium severity. CVSS v3 base score is 5.5 out of 10.