CVE-2021-42060

Name: CVE-2021-42060
Creator: NVD / NIST
Published: 2022-02-03T02:15:07.293+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2021-42060 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. An issue was discovered in Insyde InsydeH2O Kernel 5.0 through 05.08.41, Kernel 5.1 through 05.16.41, Kernel 5.2 before 05.23.22, and Kernel 5.3 before 05.32.22. An Int15ServiceSmm SMM callout vulnerability allows an attacker to hijack execution flow of code running in System Management Mode. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

An issue was discovered in Insyde InsydeH2O Kernel 5.0 through 05.08.41, Kernel 5.1 through 05.16.41, Kernel 5.2 before 05.23.22, and Kernel 5.3 before 05.32.22. An Int15ServiceSmm SMM callout vulnerability allows an attacker to hijack execution flow of code running in System Management Mode. Exploiting this issue could lead to escalating privileges to SMM.

Metrics

CVSS 3.1

8.2/10

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

EPSS Probability

0.35%

27.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Insyde	Insydeh2o	>= 5.2, < 5.23.35
Insyde	Insydeh2o	>= 5.3, < 5.32.35
Insyde	Insydeh2o	>= 5.1, < 5.16.42
Insyde	Insydeh2o	>= 5.0, < 05.08.49

References

https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0015/Third Party Advisory
https://www.insyde.com/security-pledgeVendor Advisory
https://www.insyde.com/security-pledge/SA-2022007Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfThird Party Advisory
https://security.netapp.com/advisory/ntap-20220217-0015/Third Party Advisory
https://www.insyde.com/security-pledgeVendor Advisory
https://www.insyde.com/security-pledge/SA-2022007Vendor Advisory
https://www.kb.cert.org/vuls/id/796611

Timeline

Published: Feb 3, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42060?

How severe is CVE-2021-42060?

CVE-2021-42060 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42060?

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-2021-42060?

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

Scan your code now

Source: NVD / NIST