CVSS 3.1
7.5 highCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:HCVE-2021-33625
High (7.5). EPSS 0.3% chance of exploitation in the next 30 days.
An issue was discovered in Kernel 5.x in Insyde InsydeH2O, affecting HddPassword. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-31)
- CWE
- CWE-119
- Published
- Modified
- Record from
- the NVD, synced
Affected
- insyde:insydeh2o
- netapp:fas\/aff_bios
- 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_ipc477e_pro_firmware
- siemens:simatic_ipc627e_firmware
- siemens:simatic_ipc647e_firmware
- siemens:simatic_ipc677e_firmware
- siemens:simatic_ipc847e_firmware
- siemens:simatic_itp1000_firmware