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CVE-2020-5955

An issue was discovered in Int15MicrocodeSmm in Insyde InsydeH2O before 2021-10-14 on Intel client chipsets. A caller may be able to escalate privileges.
9.8
CVSS
7.2
ShadowTrackr
NO
CISA KEV
-
NCSC.nl
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusUnavailable

Change Log
DateSourceChangesScore
2026-07-21nvdAV: P→N, AC: H→L, PR: H→N, UI: A→N, VC: N→H, VI: N→H, VA: N→H0.0 → 7.2
2026-07-21cve.orginitial, patch: Unavailable0.0
References: CVE.org · NVD

Affected Software
VendorProductVersion
insydeinsydeh2o_uefi_bios< 05.32.30.0001
insydeinsydeh2o_uefi_bios< 05.11.26.0015
insydeinsydeh2o_uefi_bios< 05.41.35.0001
insydeinsydeh2o_uefi_bios< 05.12.09.0075
insydeinsydeh2o_uefi_bios< 05.42.11.0026
insydeinsydeh2o_uefi_bios< 05.10.48.0001
insydeinsydeh2o_uefi_bios< 05.04.21.0068
insydeinsydeh2o_uefi_bios< 05.05.39.0001
insydeinsydeh2o_uefi_bios< 05.42.09.0003
insydeinsydeh2o_uefi_bios< 05.04.15.0001
insydeinsydeh2o_uefi_bios< 05.21.51.0040
insydeinsydeh2o_uefi_bios< 05.23.27.0001
insydeinsydeh2o_uefi_bios< 05.34.09.0030
insydeinsydeh2o_uefi_bios< 05.32.47.0001
insydeinsydeh2o_uefi_bios< 05.23.45.0023
insydeinsydeh2o_uefi_bios< 05.21.43.0001
insydeinsydeh2o_uefi_bios< 05.23.04.0045
Published: 2021-11-03