CVE-2020-17084

Name: CVE-2020-17084
Creator: NVD / NIST
Published: 2020-11-11T07:15:18.763+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.5/10EPSS 3.57%

Last modified Jun 17, 2026

CVE-2020-17084 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. Microsoft Exchange Server Remote Code Execution Vulnerability. EPSS estimates a 3.57% chance of exploitation in the next 30 days.

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Metrics

CVSS 3.1

8.5/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

3.57%

87.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions	Update
Microsoft	Exchange Server	2013	Cumulative Update 23
Microsoft	Exchange Server	2016	Cumulative Update 17
Microsoft	Exchange Server	2019	Cumulative Update 6

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17084Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17084Patch, Vendor Advisory

Timeline

Published: Nov 11, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-17084?

Microsoft Exchange Server Remote Code Execution Vulnerability

How severe is CVE-2020-17084?

CVE-2020-17084 has a CVSS score of 8.5/10 (HIGH severity). The EPSS model estimates a 3.57% probability of exploitation in the next 30 days.

How do I fix CVE-2020-17084?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-17084?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST