CVE-2021-28211

Name: CVE-2021-28211
Creator: NVD / NIST
Published: 2021-06-11T16:15:12.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2021-28211 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.39%

30.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tianocore	Edk2	202008

References

https://bugzilla.tianocore.org/show_bug.cgi?id=1816Exploit, Issue Tracking, Patch, Vendor Advisory
https://bugzilla.tianocore.org/show_bug.cgi?id=1816Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Jun 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28211?

A heap overflow in LzmaUefiDecompressGetInfo function in EDK II.

How severe is CVE-2021-28211?

CVE-2021-28211 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28211?

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-2021-28211?

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

Scan your code now

Source: NVD / NIST