CVE-2021-42059: Insyde INSYDEH2O

Medium severity, CVSS 6.7. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.08.41, Kernel 5.1 before 05.16.41, Kernel 5.2 before 05.26.41, Kernel 5.3 before 05.35.41, and Kernel 5.4 before 05.42.20. A stack-based buffer overflow leads toarbitrary code execution in UEFI DisplayTypeDxe DXE driver.

Affected products

• Insyde INSYDEH2O: from 5.0, before 5.08.41 (fixed in 5.08.41); from 5.1, before 5.16.41 (fixed in 5.16.41); from 5.2, before 5.26.41 (fixed in 5.26.41); from 5.3, before 5.35.41 (fixed in 5.35.41); from 5.4, before 5.42.20 (fixed in 5.42.20)
• Siemens SIMATIC Field Pg m5 Firmware: any version
• Siemens SIMATIC Field Pg m6 Firmware: any version
• Siemens SIMATIC IPC127E Firmware: any version
• Siemens SIMATIC IPC227G Firmware: any version
• Siemens SIMATIC IPC277G Firmware: any version
• Siemens SIMATIC IPC327G Firmware: any version
• Siemens SIMATIC IPC377G Firmware: any version
• Siemens SIMATIC IPC427E Firmware: any version
• Siemens SIMATIC IPC477E Firmware: any version
• Siemens SIMATIC IPC627E Firmware: any version
• Siemens SIMATIC IPC647E Firmware: any version
• Siemens SIMATIC IPC677E Firmware: any version
• Siemens SIMATIC IPC847E Firmware: any version
• Siemens SIMATIC ITP1000 Firmware: any version

Published 2022-02-03. Last modified 2026-08-11.