CVE-2021-33625
HIGH
7.5
CVSS Score
Published: February 3, 2022 at 01:55 AM UTC
Updated: August 11, 2026 at 01:28 PM UTC
35 products affected across 3 vendorsRUGGEDCOM APE1808 FirmwareInsydeH2OSIMATIC IPC477E Firmware
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Severity
HIGH7.5
Exploit prediction
EPSS 0.3%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
5.1 ≤ v < 5.16.235.2 ≤ v < 5.26.235.3 ≤ v < 5.35.235.4 ≤ v < 5.43.225.5 ≤ v < 5.51.22
Affected range stops below 5.16.23, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.26.23, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.35.23, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.43.22, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.51.22, so it looks safe — our inference, not a vendor statement
All versions
v < V1.0.202N
Affected range stops below V1.0.202N, so it looks safe — our inference, not a vendor statement
siemens-ruggedcom-ape1808 (same device)
v < V22.01.10
Affected range stops below V22.01.10, so it looks safe — our inference, not a vendor statement
siemens-simatic-field-pg-m5 (same device)
v < V26.01.13
Affected range stops below V26.01.13, so it looks safe — our inference, not a vendor statement
siemens-simatic-field-pg-m6 (same device)
v < V28.01.04
Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc277g (same device)
v < V28.01.04
Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc327g (same device)
v < V28.01.04
Affected range stops below V28.01.04, so it looks safe — our inference, not a vendor statement
siemens-simatic-ipc377g (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (6)
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfx_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20220222-0004/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.insyde.com/security-pledge/SA-2022014Source: af854a3a-2127-422b-91ae-364da2661108
https://www.kb.cert.org/vuls/id/796611Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-306654.htmlCVSS
- Attack Vector
- LOCAL
- Complexity
- HIGH
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-119
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