CVE-2021-26390

Name: CVE-2021-26390
Creator: NVD / NIST
Published: 2022-05-10T19:15:08.87+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.2/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2021-26390 is a medium-severity vulnerability rated 6.2/10 on the CVSS scale. A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.

Metrics

CVSS 3.1

6.2/10

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

EPSS Probability

0.23%

13.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Amd	Ryzen 5 2600 Firmware	All versions
Amd	Ryzen 5 2600x Firmware	All versions
Amd	Ryzen 5 2700x Firmware	All versions
Amd	Ryzen 5 2700 Firmware	All versions
Amd	Ryzen 5 3600 Firmware	All versions
Amd	Ryzen 5 3600x Firmware	All versions
Amd	Ryzen 7 3700x Firmware	All versions
Amd	Ryzen 7 3800x Firmware	All versions
Amd	Ryzen 9 3900x Firmware	All versions
Amd	Ryzen 9 3950x Firmware	All versions
Amd	Ryzen 9 5950x Firmware	All versions
Amd	Ryzen 9 5900x Firmware	All versions
Amd	Ryzen 7 5800x Firmware	All versions
Amd	Ryzen 7 5700g Firmware	All versions
Amd	Ryzen 7 5700ge Firmware	All versions
Amd	Ryzen 5 5600g Firmware	All versions
Amd	Ryzen 5 5600x Firmware	All versions
Amd	Ryzen 5 5600ge Firmware	All versions
Amd	Ryzen 3 5300g Firmware	All versions
Amd	Ryzen 3 5300ge Firmware	All versions
Amd	Ryzen Threadripper 2990wx Firmware	All versions
Amd	Ryzen Threadripper 2970wx Firmware	All versions
Amd	Ryzen Threadripper 2950x Firmware	All versions
Amd	Ryzen Threadripper 2920x Firmware	All versions
Amd	Ryzen Threadripper 3970x Firmware	All versions
Amd	Ryzen Threadripper Pro 5995wx Firmware	All versions
Amd	Ryzen Threadripper Pro 5975wx Firmware	All versions
Amd	Ryzen Threadripper Pro 5965wx Firmware	All versions
Amd	Ryzen Threadripper Pro 5955wx Firmware	All versions
Amd	Ryzen Threadripper Pro 5945wx Firmware	All versions
Amd	Ryzen 7 3750h Firmware	All versions
Amd	Ryzen 7 3700u Firmware	All versions
Amd	Ryzen 5 3550h Firmware	All versions
Amd	Ryzen 5 3500u Firmware	All versions
Amd	Ryzen 3 3300u Firmware	All versions
Amd	Ryzen 3 3200u Firmware	All versions
Amd	Athlon 300u Firmware	All versions

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027Vendor Advisory

Timeline

Published: May 10, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26390?

A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.

How severe is CVE-2021-26390?

CVE-2021-26390 has a CVSS score of 6.2/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26390?

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-2021-26390?

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

Scan your code now

Source: NVD / NIST