What is CVE-2020-27017?

CVE-2020-27017 is a medium-severity vulnerability in Microsoft Windows, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 4.9/10. Published 2020-11-09.

How severe is CVE-2020-27017?

Medium severity. CVSS v3 base score is 4.9 out of 10.

XXE in Microsoft Windows

CVE-2020-27017

Trend Micro InterScan Messaging Security Virtual Appliance (IMSVA) 9.1 is vulnerable to an XML External Entity Processing (XXE) vulnerability which could allow an authenticated administrator to read arbitrary local files. An attacker must already have obtained product administrator/root privileges to exploit this vulnerability.

Vulnerability class: XXE (XML External Entity)

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

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.065 (93.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.065 · newest: 0.065 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

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-2020-27017?: CVE-2020-27017 is a medium-severity vulnerability in Microsoft Windows, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 4.9/10. Published 2020-11-09.
How severe is CVE-2020-27017?: Medium severity. CVSS v3 base score is 4.9 out of 10.