CVE-2020-28921

Name: CVE-2020-28921
Creator: NVD / NIST
Published: 2020-11-27T18:15:11.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2020-28921 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

An issue was discovered in Devid Espenschied PC Analyser through 4.10. The PCADRVX64.SYS kernel driver exposes IOCTL functionality that allows low-privilege users to read and write to arbitrary Model Specific Registers (MSRs). This could lead to arbitrary Ring-0 code execution and escalation of privileges.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.63%

45.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Pcanalyser	Pc Analyser	<= 4.10

References

http://www.pcanalyser.de/index.php/historie/Release Notes, Vendor Advisory
https://github.com/eset/vulnerability-disclosuresThird Party Advisory
https://github.com/eset/vulnerability-disclosures/blob/master/CVE-2020-28921/CVE-2020-28921.mdExploit, Third Party Advisory
http://www.pcanalyser.de/index.php/historie/Release Notes, Vendor Advisory
https://github.com/eset/vulnerability-disclosuresThird Party Advisory
https://github.com/eset/vulnerability-disclosures/blob/master/CVE-2020-28921/CVE-2020-28921.mdExploit, Third Party Advisory

Timeline

Published: Nov 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28921?

How severe is CVE-2020-28921?

CVE-2020-28921 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28921?

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-2020-28921?

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

Scan your code now

Source: NVD / NIST