CVE-2021-0158

Improper input validation in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

Published: 2021-11-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-0158 is rated Low Risk (34.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.08%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2021-0158

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 2025-11-25 1.30% 0.08% -1.21%
2 2025-11-21 0.06% 1.30% +1.24%
3 2025-11-18 — 0.06% —

Full EPSS history (32 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-0158

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/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:H)
They need powerful rights—admin, root, or similar—before this pays off.
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.
 0.8 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2021-0158

OS Trackers for CVE-2021-0158

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2021-0158
suse high CVE-2021-0158 severity important: SUSE including 2 source package names (microcode_ctl, ucode-intel), 34 product×package rows across 34 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (34 product lines)): Known Not Affected 34. https://www.suse.com/security/cve/CVE-2021-0158/

Affected software / configurations for CVE-2021-0158

Vendor Product Version Raw CPE
intel celeron_n2805 — cpe:2.3:h:intel:celeron_n2805:-:*:*:*:*:*:*:*
intel celeron_n2806 — cpe:2.3:h:intel:celeron_n2806:-:*:*:*:*:*:*:*
intel celeron_n2807 — cpe:2.3:h:intel:celeron_n2807:-:*:*:*:*:*:*:*
intel celeron_n2808 — cpe:2.3:h:intel:celeron_n2808:-:*:*:*:*:*:*:*
intel celeron_n2810 — cpe:2.3:h:intel:celeron_n2810:-:*:*:*:*:*:*:*
intel celeron_n2815 — cpe:2.3:h:intel:celeron_n2815:-:*:*:*:*:*:*:*
intel celeron_n2820 — cpe:2.3:h:intel:celeron_n2820:-:*:*:*:*:*:*:*
intel celeron_n2830 — cpe:2.3:h:intel:celeron_n2830:-:*:*:*:*:*:*:*
intel celeron_n2840 — cpe:2.3:h:intel:celeron_n2840:-:*:*:*:*:*:*:*
intel celeron_n2910 — cpe:2.3:h:intel:celeron_n2910:-:*:*:*:*:*:*:*
intel celeron_n2920 — cpe:2.3:h:intel:celeron_n2920:-:*:*:*:*:*:*:*
intel celeron_n2930 — cpe:2.3:h:intel:celeron_n2930:-:*:*:*:*:*:*:*
intel celeron_n2940 — cpe:2.3:h:intel:celeron_n2940:-:*:*:*:*:*:*:*
intel celeron_n3000 — cpe:2.3:h:intel:celeron_n3000:-:*:*:*:*:*:*:*
intel celeron_n3010 — cpe:2.3:h:intel:celeron_n3010:-:*:*:*:*:*:*:*
intel celeron_n3050 — cpe:2.3:h:intel:celeron_n3050:-:*:*:*:*:*:*:*
intel celeron_n3060 — cpe:2.3:h:intel:celeron_n3060:-:*:*:*:*:*:*:*
intel celeron_n3150 — cpe:2.3:h:intel:celeron_n3150:-:*:*:*:*:*:*:*
intel celeron_n3160 — cpe:2.3:h:intel:celeron_n3160:-:*:*:*:*:*:*:*
intel celeron_n3350 — cpe:2.3:h:intel:celeron_n3350:-:*:*:*:*:*:*:*
intel celeron_n3350e — cpe:2.3:h:intel:celeron_n3350e:-:*:*:*:*:*:*:*
intel celeron_n3450 — cpe:2.3:h:intel:celeron_n3450:-:*:*:*:*:*:*:*
intel celeron_n4000 — cpe:2.3:h:intel:celeron_n4000:-:*:*:*:*:*:*:*
intel celeron_n4020 — cpe:2.3:h:intel:celeron_n4020:-:*:*:*:*:*:*:*
intel celeron_n4100 — cpe:2.3:h:intel:celeron_n4100:-:*:*:*:*:*:*:*
intel celeron_n4120 — cpe:2.3:h:intel:celeron_n4120:-:*:*:*:*:*:*:*
intel celeron_n4500 — cpe:2.3:h:intel:celeron_n4500:-:*:*:*:*:*:*:*
intel celeron_n4505 — cpe:2.3:h:intel:celeron_n4505:-:*:*:*:*:*:*:*
intel celeron_n5100 — cpe:2.3:h:intel:celeron_n5100:-:*:*:*:*:*:*:*
intel celeron_n5105 — cpe:2.3:h:intel:celeron_n5105:-:*:*:*:*:*:*:*
intel celeron_n6210 — cpe:2.3:h:intel:celeron_n6210:-:*:*:*:*:*:*:*
intel celeron_n6211 — cpe:2.3:h:intel:celeron_n6211:-:*:*:*:*:*:*:*
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_i3-7020u — 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:-:*:*:*:*:*:*:*
intel core_i3-8109u — cpe:2.3:h:intel:core_i3-8109u:-:*:*:*:*:*:*:*
intel core_i3-8130u — cpe:2.3:h:intel:core_i3-8130u:-:*:*:*:*:*:*:*

References for CVE-2021-0158

cvelogic Threat Intelligence