CVE-2021-45970

HIGH

8.2

CVSS Score

Published: January 5, 2022 at 10:59 PM UTC

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

18 products affected across 2 vendorsInsydeH2ORUGGEDCOM APE1808 FirmwareSIMATIC IPC427E

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Severity

HIGH8.2

Exploit prediction

EPSS 0.3%

Description

An issue was discovered in IdeBusDxe in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (the status code saved at the CommBuffer+4 location).

Affected

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

InsydeH2O · Insyde

95%

5.1 ≤ v < 5.16.255.2 ≤ v < 5.26.255.3 ≤ v < 5.35.255.4 ≤ v < 5.43.255.5 ≤ v < 05.51.25

Affected range stops below 05.51.25, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.16.25, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.26.25, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.35.25, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.43.25, 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-20220216-0004/

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

8.2HIGH[email protected]

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

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

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