CVE-2021-33103

Unintended intermediary in the BIOS authenticated code module for some Intel(R) Processors may allow a privileged user to potentially enable aescalation of privilege via local access.

Published: 2022-05-12 Last update: 2025-05-05 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-33103 is rated Low Risk (32.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.25%). 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-2021-33103

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 2026-06-15 0.06% 0.25% +0.18%
2 2025-11-21 0.04% 0.06% +0.02%
3 2025-11-18 — 0.04% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-33103

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]
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 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-2021-33103

Affected software / configurations for CVE-2021-33103

Vendor Product Version Raw CPE
intel xeon_e-2386g_firmware — cpe:2.3:o:intel:xeon_e-2386g_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2374g_firmware — cpe:2.3:o:intel:xeon_e-2374g_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2314_firmware — cpe:2.3:o:intel:xeon_e-2314_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2334_firmware — cpe:2.3:o:intel:xeon_e-2334_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2356g_firmware — cpe:2.3:o:intel:xeon_e-2356g_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2378_firmware — cpe:2.3:o:intel:xeon_e-2378_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2324g_firmware — cpe:2.3:o:intel:xeon_e-2324g_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2378g_firmware — cpe:2.3:o:intel:xeon_e-2378g_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2336_firmware — cpe:2.3:o:intel:xeon_e-2336_firmware:-:*:*:*:*:*:*:*
intel xeon_e-2388g_firmware — cpe:2.3:o:intel:xeon_e-2388g_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1350_firmware — cpe:2.3:o:intel:xeon_w-1350_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1370_firmware — cpe:2.3:o:intel:xeon_w-1370_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1370p_firmware — cpe:2.3:o:intel:xeon_w-1370p_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1390_firmware — cpe:2.3:o:intel:xeon_w-1390_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1390p_firmware — cpe:2.3:o:intel:xeon_w-1390p_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1390t_firmware — cpe:2.3:o:intel:xeon_w-1390t_firmware:-:*:*:*:*:*:*:*
intel xeon_w-1350p_firmware — cpe:2.3:o:intel:xeon_w-1350p_firmware:-:*:*:*:*:*:*:*
intel core_i3-1000g1_firmware — cpe:2.3:o:intel:core_i3-1000g1_firmware:-:*:*:*:*:*:*:*
intel core_i3-1000g4_firmware — cpe:2.3:o:intel:core_i3-1000g4_firmware:-:*:*:*:*:*:*:*
intel core_i3-1005g1_firmware — cpe:2.3:o:intel:core_i3-1005g1_firmware:-:*:*:*:*:*:*:*
intel core_i3-10100_firmware — cpe:2.3:o:intel:core_i3-10100_firmware:-:*:*:*:*:*:*:*
intel core_i3-10100e_firmware — cpe:2.3:o:intel:core_i3-10100e_firmware:-:*:*:*:*:*:*:*
intel core_i3-10100f_firmware — cpe:2.3:o:intel:core_i3-10100f_firmware:-:*:*:*:*:*:*:*
intel core_i3-10100t_firmware — cpe:2.3:o:intel:core_i3-10100t_firmware:-:*:*:*:*:*:*:*
intel core_i3-10100te_firmware — cpe:2.3:o:intel:core_i3-10100te_firmware:-:*:*:*:*:*:*:*
intel core_i3-10100y_firmware — cpe:2.3:o:intel:core_i3-10100y_firmware:-:*:*:*:*:*:*:*
intel core_i3-10105_firmware — cpe:2.3:o:intel:core_i3-10105_firmware:-:*:*:*:*:*:*:*
intel core_i3-10105f_firmware — cpe:2.3:o:intel:core_i3-10105f_firmware:-:*:*:*:*:*:*:*
intel core_i3-10105t_firmware — cpe:2.3:o:intel:core_i3-10105t_firmware:-:*:*:*:*:*:*:*
intel core_i3-10110u_firmware — cpe:2.3:o:intel:core_i3-10110u_firmware:-:*:*:*:*:*:*:*
intel core_i3-10110y_firmware — cpe:2.3:o:intel:core_i3-10110y_firmware:-:*:*:*:*:*:*:*
intel core_i3-10300_firmware — cpe:2.3:o:intel:core_i3-10300_firmware:-:*:*:*:*:*:*:*
intel core_i3-10300t_firmware — cpe:2.3:o:intel:core_i3-10300t_firmware:-:*:*:*:*:*:*:*
intel core_i3-10305_firmware — cpe:2.3:o:intel:core_i3-10305_firmware:-:*:*:*:*:*:*:*
intel core_i3-10305t_firmware — cpe:2.3:o:intel:core_i3-10305t_firmware:-:*:*:*:*:*:*:*
intel core_i3-10320_firmware — cpe:2.3:o:intel:core_i3-10320_firmware:-:*:*:*:*:*:*:*
intel core_i3-10325_firmware — cpe:2.3:o:intel:core_i3-10325_firmware:-:*:*:*:*:*:*:*
intel core_i3-11100he_firmware — cpe:2.3:o:intel:core_i3-11100he_firmware:-:*:*:*:*:*:*:*
intel core_i3-1110g4_firmware — cpe:2.3:o:intel:core_i3-1110g4_firmware:-:*:*:*:*:*:*:*
intel core_i3-1115g4_firmware — cpe:2.3:o:intel:core_i3-1115g4_firmware:-:*:*:*:*:*:*:*
intel core_i3-1115g4e_firmware — cpe:2.3:o:intel:core_i3-1115g4e_firmware:-:*:*:*:*:*:*:*
intel core_i3-1115gre_firmware — cpe:2.3:o:intel:core_i3-1115gre_firmware:-:*:*:*:*:*:*:*
intel core_i3-1120g4_firmware — cpe:2.3:o:intel:core_i3-1120g4_firmware:-:*:*:*:*:*:*:*
intel core_i3-1125g4_firmware — cpe:2.3:o:intel:core_i3-1125g4_firmware:-:*:*:*:*:*:*:*
intel core_i3-9100_firmware — cpe:2.3:o:intel:core_i3-9100_firmware:-:*:*:*:*:*:*:*
intel core_i3-9100e_firmware — cpe:2.3:o:intel:core_i3-9100e_firmware:-:*:*:*:*:*:*:*
intel core_i3-9100f_firmware — cpe:2.3:o:intel:core_i3-9100f_firmware:-:*:*:*:*:*:*:*
intel core_i3-9100hl_firmware — cpe:2.3:o:intel:core_i3-9100hl_firmware:-:*:*:*:*:*:*:*
intel core_i3-9100t_firmware — cpe:2.3:o:intel:core_i3-9100t_firmware:-:*:*:*:*:*:*:*
intel core_i3-9100te_firmware — cpe:2.3:o:intel:core_i3-9100te_firmware:-:*:*:*:*:*:*:*
intel core_i3-9300_firmware — cpe:2.3:o:intel:core_i3-9300_firmware:-:*:*:*:*:*:*:*
intel core_i3-9300t_firmware — cpe:2.3:o:intel:core_i3-9300t_firmware:-:*:*:*:*:*:*:*
intel core_i3-9320_firmware — cpe:2.3:o:intel:core_i3-9320_firmware:-:*:*:*:*:*:*:*
intel core_i3-9350k_firmware — cpe:2.3:o:intel:core_i3-9350k_firmware:-:*:*:*:*:*:*:*
intel core_i3-9350kf_firmware — cpe:2.3:o:intel:core_i3-9350kf_firmware:-:*:*:*:*:*:*:*
intel core_i5-10200h_firmware — cpe:2.3:o:intel:core_i5-10200h_firmware:-:*:*:*:*:*:*:*
intel core_i5-10210u_firmware — cpe:2.3:o:intel:core_i5-10210u_firmware:-:*:*:*:*:*:*:*
intel core_i5-10210y_firmware — cpe:2.3:o:intel:core_i5-10210y_firmware:-:*:*:*:*:*:*:*
intel core_i5-10300h_firmware — cpe:2.3:o:intel:core_i5-10300h_firmware:-:*:*:*:*:*:*:*
intel core_i5-1030g4_firmware — cpe:2.3:o:intel:core_i5-1030g4_firmware:-:*:*:*:*:*:*:*
intel core_i5-1030g7_firmware — cpe:2.3:o:intel:core_i5-1030g7_firmware:-:*:*:*:*:*:*:*
intel core_i5-10310u_firmware — cpe:2.3:o:intel:core_i5-10310u_firmware:-:*:*:*:*:*:*:*
intel core_i5-10310y_firmware — cpe:2.3:o:intel:core_i5-10310y_firmware:-:*:*:*:*:*:*:*
intel core_i5-1035g1_firmware — cpe:2.3:o:intel:core_i5-1035g1_firmware:-:*:*:*:*:*:*:*
intel core_i5-1035g4_firmware — cpe:2.3:o:intel:core_i5-1035g4_firmware:-:*:*:*:*:*:*:*
intel core_i5-1035g7_firmware — cpe:2.3:o:intel:core_i5-1035g7_firmware:-:*:*:*:*:*:*:*
intel core_i5-1038ng7_firmware — cpe:2.3:o:intel:core_i5-1038ng7_firmware:-:*:*:*:*:*:*:*
intel core_i5-10400_firmware — cpe:2.3:o:intel:core_i5-10400_firmware:-:*:*:*:*:*:*:*
intel core_i5-10400f_firmware — cpe:2.3:o:intel:core_i5-10400f_firmware:-:*:*:*:*:*:*:*
intel core_i5-10400h_firmware — cpe:2.3:o:intel:core_i5-10400h_firmware:-:*:*:*:*:*:*:*
intel core_i5-10400t_firmware — cpe:2.3:o:intel:core_i5-10400t_firmware:-:*:*:*:*:*:*:*
intel core_i5-10500_firmware — cpe:2.3:o:intel:core_i5-10500_firmware:-:*:*:*:*:*:*:*
intel core_i5-10500e_firmware — cpe:2.3:o:intel:core_i5-10500e_firmware:-:*:*:*:*:*:*:*
intel core_i5-10500h_firmware — cpe:2.3:o:intel:core_i5-10500h_firmware:-:*:*:*:*:*:*:*
intel core_i5-10500t_firmware — cpe:2.3:o:intel:core_i5-10500t_firmware:-:*:*:*:*:*:*:*
intel core_i5-10500te_firmware — cpe:2.3:o:intel:core_i5-10500te_firmware:-:*:*:*:*:*:*:*
intel core_i5-10505_firmware — cpe:2.3:o:intel:core_i5-10505_firmware:-:*:*:*:*:*:*:*
intel core_i5-10600_firmware — cpe:2.3:o:intel:core_i5-10600_firmware:-:*:*:*:*:*:*:*
intel core_i5-10600k_firmware — cpe:2.3:o:intel:core_i5-10600k_firmware:-:*:*:*:*:*:*:*
intel core_i5-10600kf_firmware — cpe:2.3:o:intel:core_i5-10600kf_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-33103

cvelogic Threat Intelligence