CVE-2021-0091

Improper access control in the firmware for some Intel(R) Processors may allow an unauthenticated user to potentially enable an escalation of privilege via local access.

Published: 2022-02-09 Last update: 2025-05-05 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-0091 is rated Moderate Risk (52.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.42%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-0091

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.11% 0.42% +0.31%
2 2025-11-18 0.36% 0.11% -0.25%
3 2025-10-02 — 0.36% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-0091

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-0091

Affected software / configurations for CVE-2021-0091

Vendor Product Version Raw CPE
intel atom_c3308 — cpe:2.3:h:intel:atom_c3308:-:*:*:*:*:*:*:*
intel atom_c3336 — cpe:2.3:h:intel:atom_c3336:-:*:*:*:*:*:*:*
intel atom_c3338 — cpe:2.3:h:intel:atom_c3338:-:*:*:*:*:*:*:*
intel atom_c3338r — cpe:2.3:h:intel:atom_c3338r:-:*:*:*:*:*:*:*
intel atom_c3436l — cpe:2.3:h:intel:atom_c3436l:-:*:*:*:*:*:*:*
intel atom_c3508 — cpe:2.3:h:intel:atom_c3508:-:*:*:*:*:*:*:*
intel atom_c3538 — cpe:2.3:h:intel:atom_c3538:-:*:*:*:*:*:*:*
intel atom_c3558 — cpe:2.3:h:intel:atom_c3558:-:*:*:*:*:*:*:*
intel atom_c3558r — cpe:2.3:h:intel:atom_c3558r:-:*:*:*:*:*:*:*
intel atom_c3708 — cpe:2.3:h:intel:atom_c3708:-:*:*:*:*:*:*:*
intel atom_c3750 — cpe:2.3:h:intel:atom_c3750:-:*:*:*:*:*:*:*
intel atom_c3758 — cpe:2.3:h:intel:atom_c3758:-:*:*:*:*:*:*:*
intel atom_c3758r — cpe:2.3:h:intel:atom_c3758r:-:*:*:*:*:*:*:*
intel atom_c3808 — cpe:2.3:h:intel:atom_c3808:-:*:*:*:*:*:*:*
intel atom_c3830 — cpe:2.3:h:intel:atom_c3830:-:*:*:*:*:*:*:*
intel atom_c3850 — cpe:2.3:h:intel:atom_c3850:-:*:*:*:*:*:*:*
intel atom_c3858 — cpe:2.3:h:intel:atom_c3858:-:*:*:*:*:*:*:*
intel atom_c3950 — cpe:2.3:h:intel:atom_c3950:-:*:*:*:*:*:*:*
intel atom_c3955 — cpe:2.3:h:intel:atom_c3955:-:*:*:*:*:*:*:*
intel atom_c3958 — cpe:2.3:h:intel:atom_c3958:-:*:*:*:*:*:*:*
intel core_i3-1000g1 — cpe:2.3:h:intel:core_i3-1000g1:-:*:*:*:*:*:*:*
intel core_i3-1000g4 — cpe:2.3:h:intel:core_i3-1000g4:-:*:*:*:*:*:*:*
intel core_i3-1005g1 — cpe:2.3:h:intel:core_i3-1005g1:-:*:*:*:*:*:*:*
intel core_i3-10100 — cpe:2.3:h:intel:core_i3-10100:-:*:*:*:*:*:*:*
intel core_i3-10100e — cpe:2.3:h:intel:core_i3-10100e:-:*:*:*:*:*:*:*
intel core_i3-10100f — cpe:2.3:h:intel:core_i3-10100f:-:*:*:*:*:*:*:*
intel core_i3-10100t — cpe:2.3:h:intel:core_i3-10100t:-:*:*:*:*:*:*:*
intel core_i3-10100te — cpe:2.3:h:intel:core_i3-10100te:-:*:*:*:*:*:*:*
intel core_i3-10100y — cpe:2.3:h:intel:core_i3-10100y:-:*:*:*:*:*:*:*
intel core_i3-10105 — cpe:2.3:h:intel:core_i3-10105:-:*:*:*:*:*:*:*
intel core_i3-10105f — cpe:2.3:h:intel:core_i3-10105f:-:*:*:*:*:*:*:*
intel core_i3-10105t — cpe:2.3:h:intel:core_i3-10105t:-:*:*:*:*:*:*:*
intel core_i3-10110u — cpe:2.3:h:intel:core_i3-10110u:-:*:*:*:*:*:*:*
intel core_i3-10110y — cpe:2.3:h:intel:core_i3-10110y:-:*:*:*:*:*:*:*
intel core_i3-10300 — cpe:2.3:h:intel:core_i3-10300:-:*:*:*:*:*:*:*
intel core_i3-10300t — cpe:2.3:h:intel:core_i3-10300t:-:*:*:*:*:*:*:*
intel core_i3-10305 — cpe:2.3:h:intel:core_i3-10305:-:*:*:*:*:*:*:*
intel core_i3-10305t — cpe:2.3:h:intel:core_i3-10305t:-:*:*:*:*:*:*:*
intel core_i3-10320 — cpe:2.3:h:intel:core_i3-10320:-:*:*:*:*:*:*:*
intel core_i3-10325 — cpe:2.3:h:intel:core_i3-10325:-:*:*:*:*:*:*:*
intel core_i3-11100he — cpe:2.3:h:intel:core_i3-11100he:-:*:*:*:*:*:*:*
intel core_i3-1110g4 — cpe:2.3:h:intel:core_i3-1110g4:-:*:*:*:*:*:*:*
intel core_i3-1115g4 — cpe:2.3:h:intel:core_i3-1115g4:-:*:*:*:*:*:*:*
intel core_i3-1115g4e — cpe:2.3:h:intel:core_i3-1115g4e:-:*:*:*:*:*:*:*
intel core_i3-1115gre — cpe:2.3:h:intel:core_i3-1115gre:-:*:*:*:*:*:*:*
intel core_i3-1120g4 — cpe:2.3:h:intel:core_i3-1120g4:-:*:*:*:*:*:*:*
intel core_i3-1125g4 — cpe:2.3:h:intel:core_i3-1125g4:-:*:*:*:*:*:*:*
intel core_i3-6006u — cpe:2.3:h:intel:core_i3-6006u:-:*:*:*:*:*:*:*
intel core_i3-6098p — cpe:2.3:h:intel:core_i3-6098p:-:*:*:*:*:*:*:*
intel core_i3-6100 — cpe:2.3:h:intel:core_i3-6100:-:*:*:*:*:*:*:*
intel core_i3-6100e — cpe:2.3:h:intel:core_i3-6100e:-:*:*:*:*:*:*:*
intel core_i3-6100h — cpe:2.3:h:intel:core_i3-6100h:-:*:*:*:*:*:*:*
intel core_i3-6100t — cpe:2.3:h:intel:core_i3-6100t:-:*:*:*:*:*:*:*
intel core_i3-6100te — cpe:2.3:h:intel:core_i3-6100te:-:*:*:*:*:*:*:*
intel core_i3-6100u — cpe:2.3:h:intel:core_i3-6100u:-:*:*:*:*:*:*:*
intel core_i3-6102e — cpe:2.3:h:intel:core_i3-6102e:-:*:*:*:*:*:*:*
intel core_i3-6157u — cpe:2.3:h:intel:core_i3-6157u:-:*:*:*:*:*:*:*
intel core_i3-6167u — cpe:2.3:h:intel:core_i3-6167u:-:*:*:*:*:*:*:*
intel core_i3-6300 — cpe:2.3:h:intel:core_i3-6300:-:*:*:*:*:*:*:*
intel core_i3-6300t — cpe:2.3:h:intel:core_i3-6300t:-:*:*:*:*:*:*:*
intel core_i3-6320 — cpe:2.3:h:intel:core_i3-6320:-:*:*:*:*:*:*:*
intel core_i3-7020u — cpe:2.3:h:intel:core_i3-7020u:-:*:*:*:*:*:*:*
intel core_i3-7100 — cpe:2.3:h:intel:core_i3-7100:-:*:*:*:*:*:*:*
intel core_i3-7100e — cpe:2.3:h:intel:core_i3-7100e:-:*:*:*:*:*:*:*
intel core_i3-7100h — cpe:2.3:h:intel:core_i3-7100h:-:*:*:*:*:*:*:*
intel core_i3-7100t — cpe:2.3:h:intel:core_i3-7100t:-:*:*:*:*:*:*:*
intel core_i3-7100u — cpe:2.3:h:intel:core_i3-7100u:-:*:*:*:*:*:*:*
intel core_i3-7101e — cpe:2.3:h:intel:core_i3-7101e:-:*:*:*:*:*:*:*
intel core_i3-7101te — cpe:2.3:h:intel:core_i3-7101te:-:*:*:*:*:*:*:*
intel core_i3-7102e — cpe:2.3:h:intel:core_i3-7102e:-:*:*:*:*:*:*:*
intel core_i3-7130u — cpe:2.3:h:intel:core_i3-7130u:-:*:*:*:*:*:*:*
intel core_i3-7167u — cpe:2.3:h:intel:core_i3-7167u:-:*:*:*:*:*:*:*
intel core_i3-7300 — cpe:2.3:h:intel:core_i3-7300:-:*:*:*:*:*:*:*
intel core_i3-7300t — cpe:2.3:h:intel:core_i3-7300t:-:*:*:*:*:*:*:*
intel core_i3-7320 — cpe:2.3:h:intel:core_i3-7320:-:*:*:*:*:*:*:*
intel core_i3-7350k — cpe:2.3:h:intel:core_i3-7350k:-:*:*:*:*:*:*:*
intel core_i3-8100 — cpe:2.3:h:intel:core_i3-8100:-:*:*:*:*:*:*:*
intel core_i3-8100b — cpe:2.3:h:intel:core_i3-8100b:-:*:*:*:*:*:*:*
intel core_i3-8100h — cpe:2.3:h:intel:core_i3-8100h:-:*:*:*:*:*:*:*
intel core_i3-8100t — cpe:2.3:h:intel:core_i3-8100t:-:*:*:*:*:*:*:*

References for CVE-2021-0091

cvelogic Threat Intelligence