CVE-2021-28216

Name: CVE-2021-28216
Creator: NVD / NIST
Published: 2021-08-05T21:15:11.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2021-28216 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. BootPerformanceTable pointer is read from an NVRAM variable in PEI. Recommend setting PcdFirmwarePerformanceDataTableS3Support to FALSE.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

BootPerformanceTable pointer is read from an NVRAM variable in PEI. Recommend setting PcdFirmwarePerformanceDataTableS3Support to FALSE.

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

0.43%

34.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tianocore	Edk Ii	All versions

References

https://bugzilla.tianocore.org/show_bug.cgi?id=2957Exploit, Issue Tracking, Vendor Advisory
https://bugzilla.tianocore.org/show_bug.cgi?id=2957Exploit, Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html

Timeline

Published: Aug 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28216?

BootPerformanceTable pointer is read from an NVRAM variable in PEI. Recommend setting PcdFirmwarePerformanceDataTableS3Support to FALSE.

How severe is CVE-2021-28216?

CVE-2021-28216 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28216?

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-2021-28216?

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

Scan your code now

Source: NVD / NIST