CVSS 3.1
8.2 highCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HCVE-2021-42554
High (8.2). EPSS 0.3% chance of exploitation in the next 30 days.
An issue was discovered in Insyde InsydeH2O with Kernel 5.0 before 05.08.42, Kernel 5.1 before 05.16.42, Kernel 5.2 before 05.26.42, Kernel 5.3 before 05.35.42, Kernel 5.4 before 05.42.51, and Kernel 5.5 before 05.50.51. An SMM memory corruption vulnerability in FvbServicesRuntimeDxe allows a possible attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
- CWE
- CWE-787
- Published
- Modified
- Record from
- the NVD, synced
Affected
- insyde:insydeh2o
- siemens:ruggedcom_ape1808_firmware
- siemens:simatic_field_pg_m5_firmware
- siemens:simatic_field_pg_m6_firmware
- siemens:simatic_ipc127e_firmware
- siemens:simatic_ipc227g_firmware
- siemens:simatic_ipc277g_firmware
- siemens:simatic_ipc327g_firmware
- siemens:simatic_ipc377g_firmware
- siemens:simatic_ipc427e_firmware
- siemens:simatic_ipc477e_firmware
- siemens:simatic_ipc627e_firmware
- siemens:simatic_ipc647e_firmware
- siemens:simatic_ipc677e_firmware
- siemens:simatic_ipc847e_firmware
- siemens:simatic_itp1000_firmware