CVE-2021-0155

Unchecked return value in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable information disclosure via local access.

Published: 2022-05-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-0155 is rated Low Risk (27.9/100): 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-2021-0155

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 0.11% 0.25% +0.14%
2 2025-03-17 0.04% 0.11% +0.07%
3 2023-03-07 — 0.04% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-0155

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 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:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 [email protected]
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 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:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N 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:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2021-0155

Affected software / configurations for CVE-2021-0155

Vendor Product Version Raw CPE
intel xeon_e7-8894_v4_firmware — cpe:2.3:o:intel:xeon_e7-8894_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-4809_v4_firmware — cpe:2.3:o:intel:xeon_e7-4809_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-4820_v4_firmware — cpe:2.3:o:intel:xeon_e7-4820_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-4830_v4_firmware — cpe:2.3:o:intel:xeon_e7-4830_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-4850_v4_firmware — cpe:2.3:o:intel:xeon_e7-4850_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8860_v4_firmware — cpe:2.3:o:intel:xeon_e7-8860_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8867_v4_firmware — cpe:2.3:o:intel:xeon_e7-8867_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8870_v4_firmware — cpe:2.3:o:intel:xeon_e7-8870_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8880_v4_firmware — cpe:2.3:o:intel:xeon_e7-8880_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8890_v4_firmware — cpe:2.3:o:intel:xeon_e7-8890_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8891_v4_firmware — cpe:2.3:o:intel:xeon_e7-8891_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_e7-8893_v4_firmware — cpe:2.3:o:intel:xeon_e7-8893_v4_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1702_firmware — cpe:2.3:o:intel:xeon_d-1702_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1712tr_firmware — cpe:2.3:o:intel:xeon_d-1712tr_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1713nt_firmware — cpe:2.3:o:intel:xeon_d-1713nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1713nte_firmware — cpe:2.3:o:intel:xeon_d-1713nte_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1714_firmware — cpe:2.3:o:intel:xeon_d-1714_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1715ter_firmware — cpe:2.3:o:intel:xeon_d-1715ter_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1718t_firmware — cpe:2.3:o:intel:xeon_d-1718t_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1722ne_firmware — cpe:2.3:o:intel:xeon_d-1722ne_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1726_firmware — cpe:2.3:o:intel:xeon_d-1726_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1732te_firmware — cpe:2.3:o:intel:xeon_d-1732te_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1733nt_firmware — cpe:2.3:o:intel:xeon_d-1733nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1734nt_firmware — cpe:2.3:o:intel:xeon_d-1734nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1735tr_firmware — cpe:2.3:o:intel:xeon_d-1735tr_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1736_firmware — cpe:2.3:o:intel:xeon_d-1736_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1736nt_firmware — cpe:2.3:o:intel:xeon_d-1736nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1739_firmware — cpe:2.3:o:intel:xeon_d-1739_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1746ter_firmware — cpe:2.3:o:intel:xeon_d-1746ter_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1747nte_firmware — cpe:2.3:o:intel:xeon_d-1747nte_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1748te_firmware — cpe:2.3:o:intel:xeon_d-1748te_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1749nt_firmware — cpe:2.3:o:intel:xeon_d-1749nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2712t_firmware — cpe:2.3:o:intel:xeon_d-2712t_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2733nt_firmware — cpe:2.3:o:intel:xeon_d-2733nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2738_firmware — cpe:2.3:o:intel:xeon_d-2738_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2752nte_firmware — cpe:2.3:o:intel:xeon_d-2752nte_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2752ter_firmware — cpe:2.3:o:intel:xeon_d-2752ter_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2753nt_firmware — cpe:2.3:o:intel:xeon_d-2753nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2766nt_firmware — cpe:2.3:o:intel:xeon_d-2766nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2775te_firmware — cpe:2.3:o:intel:xeon_d-2775te_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2776nt_firmware — cpe:2.3:o:intel:xeon_d-2776nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2779_firmware — cpe:2.3:o:intel:xeon_d-2779_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2786nte_firmware — cpe:2.3:o:intel:xeon_d-2786nte_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2795nt_firmware — cpe:2.3:o:intel:xeon_d-2795nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2796nt_firmware — cpe:2.3:o:intel:xeon_d-2796nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2796te_firmware — cpe:2.3:o:intel:xeon_d-2796te_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2798nt_firmware — cpe:2.3:o:intel:xeon_d-2798nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2799_firmware — cpe:2.3:o:intel:xeon_d-2799_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1602_firmware — cpe:2.3:o:intel:xeon_d-1602_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1622_firmware — cpe:2.3:o:intel:xeon_d-1622_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1623n_firmware — cpe:2.3:o:intel:xeon_d-1623n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1627_firmware — cpe:2.3:o:intel:xeon_d-1627_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1633n_firmware — cpe:2.3:o:intel:xeon_d-1633n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1637_firmware — cpe:2.3:o:intel:xeon_d-1637_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1649n_firmware — cpe:2.3:o:intel:xeon_d-1649n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1653n_firmware — cpe:2.3:o:intel:xeon_d-1653n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2123it_firmware — cpe:2.3:o:intel:xeon_d-2123it_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2141i_firmware — cpe:2.3:o:intel:xeon_d-2141i_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2142it_firmware — cpe:2.3:o:intel:xeon_d-2142it_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2143it_firmware — cpe:2.3:o:intel:xeon_d-2143it_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2145nt_firmware — cpe:2.3:o:intel:xeon_d-2145nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2146nt_firmware — cpe:2.3:o:intel:xeon_d-2146nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2161i_firmware — cpe:2.3:o:intel:xeon_d-2161i_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2163it_firmware — cpe:2.3:o:intel:xeon_d-2163it_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2166nt_firmware — cpe:2.3:o:intel:xeon_d-2166nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2173it_firmware — cpe:2.3:o:intel:xeon_d-2173it_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2177nt_firmware — cpe:2.3:o:intel:xeon_d-2177nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2183it_firmware — cpe:2.3:o:intel:xeon_d-2183it_firmware:-:*:*:*:*:*:*:*
intel xeon_d-2187nt_firmware — cpe:2.3:o:intel:xeon_d-2187nt_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1513n_firmware — cpe:2.3:o:intel:xeon_d-1513n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1523n_firmware — cpe:2.3:o:intel:xeon_d-1523n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1533n_firmware — cpe:2.3:o:intel:xeon_d-1533n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1543n_firmware — cpe:2.3:o:intel:xeon_d-1543n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1553n_firmware — cpe:2.3:o:intel:xeon_d-1553n_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1529_firmware — cpe:2.3:o:intel:xeon_d-1529_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1539_firmware — cpe:2.3:o:intel:xeon_d-1539_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1559_firmware — cpe:2.3:o:intel:xeon_d-1559_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1557_firmware — cpe:2.3:o:intel:xeon_d-1557_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1567_firmware — cpe:2.3:o:intel:xeon_d-1567_firmware:-:*:*:*:*:*:*:*
intel xeon_d-1571_firmware — cpe:2.3:o:intel:xeon_d-1571_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-0155

cvelogic Threat Intelligence