CVE-2020-10143

Name: CVE-2020-10143
Creator: NVD / NIST
Published: 2020-12-09T23:15:12.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2020-10143 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Macrium Reflect includes an OpenSSL component that specifies an OPENSSLDIR variable as C:\openssl\. Macrium Reflect contains a privileged service that uses this OpenSSL component. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

Macrium Reflect includes an OpenSSL component that specifies an OPENSSLDIR variable as C:\openssl\. Macrium Reflect contains a privileged service that uses this OpenSSL component. Because unprivileged Windows users can create subdirectories off of the system root, a user can create the appropriate path to a specially-crafted openssl.cnf file to achieve arbitrary code execution with SYSTEM privileges.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.59%

43.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Macrium	Reflect	< 7.3.5281

References

https://www.kb.cert.org/vuls/id/760767Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/760767Third Party Advisory, US Government Resource

Timeline

Published: Dec 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10143?

How severe is CVE-2020-10143?

CVE-2020-10143 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10143?

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-2020-10143?

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

Scan your code now

Source: NVD / NIST