CVE-2021-43522

HIGH

7.5

CVSS Score

Published: February 2, 2022 at 11:41 PM UTC

Updated: August 11, 2026 at 01:28 PM UTC

18 products affected across 2 vendorsInsydeH2ORUGGEDCOM APE1808 FirmwareSIMATIC IPC427E

Using N/A by N/A?

Get instant alerts when new vulnerabilities affect N/A - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.5

Exploit prediction

EPSS 0.3%

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.1 through 2021-11-08, 5.2 through 2021-11-08, and 5.3 through 2021-11-08. A StorageSecurityCommandDxe SMM memory corruption vulnerability allows an attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

InsydeH2O · Insyde

95%

5.1 ≤ v < 5.14.345.2 ≤ v < 5.24.345.3 ≤ v < 5.33.34

Affected range stops below 5.14.34, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.24.34, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.33.34, so it looks safe — our inference, not a vendor statement

RUGGEDCOM APE1808 Firmware · Siemens

60%

v < V1.0.202N

Affected range stops below V1.0.202N, so it looks safe — our inference, not a vendor statement

SIMATIC Field Pg M5 Firmware · Siemens

60%

v < V22.01.10

Affected range stops below V22.01.10, so it looks safe — our inference, not a vendor statement

SIMATIC Field Pg M6 Firmware · Siemens

60%

v < V26.01.13

Affected range stops below V26.01.13, so it looks safe — our inference, not a vendor statement

SIMATIC IPC127E · Siemens

60%

v < V27.01.09

Affected range stops below V27.01.09, so it looks safe — our inference, not a vendor statement

SIMATIC IPC227G · Siemens

60%

v < V28.01.04

Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement

SIMATIC IPC277G Firmware · Siemens

60%

v < V28.01.04

Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement

SIMATIC IPC327G Firmware · Siemens

60%

v < V28.01.04

Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement

SIMATIC IPC377G Firmware · Siemens

60%

v < V28.01.04

Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement

SIMATIC IPC427E · Siemens

60%

v < V21.01.17

Affected range stops below V21.01.17, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.insyde.com/security-pledge

References (5)

x_refsource_CONFIRMThird Party Advisory

Source: [email protected]

https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf

x_refsource_CONFIRMThird Party Advisory

Source: [email protected]

https://security.netapp.com/advisory/ntap-20220216-0003/

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.insyde.com/security-pledge

Source: af854a3a-2127-422b-91ae-364da2661108

https://www.kb.cert.org/vuls/id/796611

Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

https://cert-portal.siemens.com/productcert/html/ssa-306654.html

CVSS

7.5HIGH[email protected]

Attack Vector: LOCAL
Complexity: HIGH
Privileges: HIGH
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card