ReviewHigh

CVE-2021-42060

RUGGEDCOM APE1808 - BIOS, SIMATIC Field PG M5

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.

CVSS: 8.2
EPSS: 0.35%
CISA KEV: Not listed
Published: 2022.02.03

PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.35%

Technical severityCVSS 8.2

Vulnerability overview

Affected product and versions

Product: RUGGEDCOM APE1808 - BIOS, SIMATIC Field PG M5
Affected versions: < V1.0.202N, < V22.01.10, < V26.01.13, < V27.01.09, < V28.01.04, < V21.01.17, < V25.02.12, < V23.01.10, >= 5.2 < 5.23.35, >= 5.3 < 5.32.35, >= 5.1 < 5.16.42, >= 5.0 < 05.08.49
Fixed versions: 5.23.35, 5.32.35, 5.16.42, 05.08.49

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that RUGGEDCOM APE1808 - BIOS, SIMATIC Field PG M5 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE: Not available