---
id: CVE-2021-42113
title: >-
  An issue was discovered in StorageSecurityCommandDxe in Insyde InsydeH2O with
  Kernel 5.1 before 05.14.28, Kernel 5.2 before 05.24.28, and Kernel 5.3 before
  05.32.25
summary: >-
  An issue was discovered in StorageSecurityCommandDxe in Insyde InsydeH2O with
  Kernel 5.1 before 05.14.28, Kernel 5.2 before 05.24.28, and Kernel 5.3 before
  05.32.25. An SMM callout vulnerability allows an attacker to hijack execution
  flo…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'
vendor: insyde
product: insydeh2o
affected:
  - 'insydeh2o >= 5.1, < 5.14.34'
  - 'insydeh2o >= 5.2, < 5.24.34'
  - 'insydeh2o >= 5.3, < 5.24.34'
patched:
  - insydeh2o 5.24.34
published: '2022-02-03'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-42113'
references:
  - url: 'https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20220216-0012/'
    label: cve@mitre.org
  - url: 'https://www.insyde.com/security-pledge'
    label: cve@mitre.org
  - url: 'https://www.insyde.com/security-pledge/SA-2022008'
    label: cve@mitre.org
  - url: 'https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20220216-0012/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.insyde.com/security-pledge'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.insyde.com/security-pledge/SA-2022008'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.kb.cert.org/vuls/id/796611'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-306654.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00297
epssPercentile: 0.1995
ingestedAt: '2026-08-11T16:47:02.228Z'
---

## Overview

An issue was discovered in StorageSecurityCommandDxe in Insyde InsydeH2O with Kernel 5.1 before 05.14.28, Kernel 5.2 before 05.24.28, and Kernel 5.3 before 05.32.25. An 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.

## Affected

- `insydeh2o >= 5.1, < 5.14.34`
- `insydeh2o >= 5.2, < 5.24.34`
- `insydeh2o >= 5.3, < 5.24.34`

## Remediation

Upgrade past the affected range:

- `insydeh2o 5.24.34`