CVE-2021-33086

Out-of-bounds write in firmware for some Intel(R) NUCs may allow an authenticated user to potentially enable denial of service via local access.

Published: 2021-11-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-33086 is rated Low Risk (26.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.21%). 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-2021-33086

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 0.04% 0.21% +0.17%
2 2025-03-30 0.09% 0.04% -0.04%
3 2025-03-29 — 0.09% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-33086

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:N/I:N/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.9 2.0 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 6.9 [email protected]

Weakness enumeration for CVE-2021-33086

Affected software / configurations for CVE-2021-33086

Vendor Product Version Raw CPE
intel nuc_m15_laptop_kit_lapbc510_firmware < bctgl357.0064 cpe:2.3:o:intel:nuc_m15_laptop_kit_lapbc510_firmware:*:*:*:*:*:*:*:*
intel nuc_m15_laptop_kit_lapbc710_firmware < bctgl357.0064 cpe:2.3:o:intel:nuc_m15_laptop_kit_lapbc710_firmware:*:*:*:*:*:*:*:*
intel nuc_11_compute_element_cm11ebc4w_firmware < ebtgl357.0056 cpe:2.3:o:intel:nuc_11_compute_element_cm11ebc4w_firmware:*:*:*:*:*:*:*:*
intel nuc_11_compute_element_cm11ebi38w_firmware < ebtgl357.0056 cpe:2.3:o:intel:nuc_11_compute_element_cm11ebi38w_firmware:*:*:*:*:*:*:*:*
intel nuc_11_compute_element_cm11ebi58w_firmware < ebtgl357.0056 cpe:2.3:o:intel:nuc_11_compute_element_cm11ebi58w_firmware:*:*:*:*:*:*:*:*
intel nuc_11_compute_element_cm11ebi716w_firmware < ebtgl357.0056 cpe:2.3:o:intel:nuc_11_compute_element_cm11ebi716w_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_kit_nuc11pahi3_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_kit_nuc11pahi3_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_kit_nuc11pahi5_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_kit_nuc11pahi5_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_kit_nuc11pahi7_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_kit_nuc11pahi7_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_kit_nuc11paki3_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_kit_nuc11paki3_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_kit_nuc11paki5_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_kit_nuc11paki5_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_kit_nuc11paki7_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_kit_nuc11paki7_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_mini_pc_nuc11paqi50wa_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_mini_pc_nuc11paqi50wa_firmware:*:*:*:*:*:*:*:*
intel nuc_11_performance_mini_pc_nuc11paqi70qa_firmware < patgl357.0040 cpe:2.3:o:intel:nuc_11_performance_mini_pc_nuc11paqi70qa_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_board_nuc11tnbi3_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_board_nuc11tnbi3_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_board_nuc11tnbi5_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_board_nuc11tnbi5_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_board_nuc11tnbi7_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_board_nuc11tnbi7_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi3_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi3_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi30l_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi30l_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi30p_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi30p_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi5_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi5_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi50l_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi50l_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi50w_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi50w_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi7_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi7_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi70l_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi70l_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnhi70q_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi70q_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnki3_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnki3_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnki5_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnki5_firmware:*:*:*:*:*:*:*:*
intel nuc_11_pro_kit_nuc11tnki7_firmware < tntgl357.0057 cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnki7_firmware:*:*:*:*:*:*:*:*
intel nuc_11_enthusiast_kit_nuc11phki7c_firmware < phtgl579.0062 cpe:2.3:o:intel:nuc_11_enthusiast_kit_nuc11phki7c_firmware:*:*:*:*:*:*:*:*
intel nuc_11_enthusiast_mini_pc_nuc11phki7caa_firmware < phtgl579.0062 cpe:2.3:o:intel:nuc_11_enthusiast_mini_pc_nuc11phki7caa_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i3fnh_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i3fnh_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i3fnhf_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i3fnhf_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i3fnk_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i3fnk_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnh_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnh_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnhf_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnhf_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnhj_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnhj_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnk_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnk_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnkp_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnkp_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnh_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnh_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnhc_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnhc_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnk_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnk_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnkp_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnkp_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i3fnhfa_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i3fnhfa_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i3fnhja_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i3fnhja_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnhca_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnhca_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnhja_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnhja_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i5fnkpa_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i5fnkpa_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnhaa_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnhaa_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnhja_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnhja_firmware:*:*:*:*:*:*:*:*
intel nuc_10_performance_kit_nuc10i7fnkpa_firmware < fncml.0052 cpe:2.3:o:intel:nuc_10_performance_kit_nuc10i7fnkpa_firmware:*:*:*:*:*:*:*:*
intel nuc_9_pro_compute_element_nuc9v7qnb_firmware < qncflx70.0063 cpe:2.3:o:intel:nuc_9_pro_compute_element_nuc9v7qnb_firmware:*:*:*:*:*:*:*:*
intel nuc_9_pro_compute_element_nuc9vxqnb_firmware < qncflx70.0063 cpe:2.3:o:intel:nuc_9_pro_compute_element_nuc9vxqnb_firmware:*:*:*:*:*:*:*:*
intel nuc_9_pro_kit_nuc9v7qnx_firmware < qncflx70.0063 cpe:2.3:o:intel:nuc_9_pro_kit_nuc9v7qnx_firmware:*:*:*:*:*:*:*:*
intel nuc_9_pro_kit_nuc9vxqnx_firmware < qncflx70.0063 cpe:2.3:o:intel:nuc_9_pro_kit_nuc9vxqnx_firmware:*:*:*:*:*:*:*:*
intel nuc_8_business_nuc8i7hnkqc_firmware < hnkbli70.86a.0067 cpe:2.3:o:intel:nuc_8_business_nuc8i7hnkqc_firmware:*:*:*:*:*:*:*:*
intel nuc_8_enthusiast_nuc8i7hvkva_firmware < hnkbli70.86a.0067 cpe:2.3:o:intel:nuc_8_enthusiast_nuc8i7hvkva_firmware:*:*:*:*:*:*:*:*
intel nuc_8_enthusiast_nuc8i7hvkvaw_firmware < hnkbli70.86a.0067 cpe:2.3:o:intel:nuc_8_enthusiast_nuc8i7hvkvaw_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i7hnk_firmware < hnkbli70.86a.0067 cpe:2.3:o:intel:nuc_kit_nuc8i7hnk_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i7hvk_firmware < hnkbli70.86a.0067 cpe:2.3:o:intel:nuc_kit_nuc8i7hvk_firmware:*:*:*:*:*:*:*:*
intel nuc_8_enthusiast_nuc8i7behga_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_8_enthusiast_nuc8i7behga_firmware:*:*:*:*:*:*:*:*
intel nuc_8_enthusiast_nuc8i7bekqa_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_8_enthusiast_nuc8i7bekqa_firmware:*:*:*:*:*:*:*:*
intel nuc_8_home_nuc8i3behfa_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_8_home_nuc8i3behfa_firmware:*:*:*:*:*:*:*:*
intel nuc_8_home_nuc8i5behfa_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_8_home_nuc8i5behfa_firmware:*:*:*:*:*:*:*:*
intel nuc_8_home_nuc8i5bekpa_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_8_home_nuc8i5bekpa_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i3beh_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i3beh_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i3behs_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i3behs_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i3bek_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i3bek_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i5beh_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i5beh_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i5behs_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i5behs_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i5bek_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i5bek_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i7beh_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i7beh_firmware:*:*:*:*:*:*:*:*
intel nuc_kit_nuc8i7bek_firmware < becfl357.86a.0088 cpe:2.3:o:intel:nuc_kit_nuc8i7bek_firmware:*:*:*:*:*:*:*:*
intel nuc_8_home_nuc8i3cysm_firmware < cycnli35.86a.0049 cpe:2.3:o:intel:nuc_8_home_nuc8i3cysm_firmware:*:*:*:*:*:*:*:*
intel nuc_8_home_nuc8i3cysn_firmware < cycnli35.86a.0049 cpe:2.3:o:intel:nuc_8_home_nuc8i3cysn_firmware:*:*:*:*:*:*:*:*
intel nuc_8_rugged_kit_nuc8cchkr_firmware < chaplcel.0054 cpe:2.3:o:intel:nuc_8_rugged_kit_nuc8cchkr_firmware:*:*:*:*:*:*:*:*
intel nuc_board_nuc8cchb_firmware < chaplcel.0054 cpe:2.3:o:intel:nuc_board_nuc8cchb_firmware:*:*:*:*:*:*:*:*
intel nuc_8_compute_element_cm8ccb_firmware < cbwhl.0094 cpe:2.3:o:intel:nuc_8_compute_element_cm8ccb_firmware:*:*:*:*:*:*:*:*
intel nuc_8_compute_element_cm8i3cb_firmware < cbwhl.0094 cpe:2.3:o:intel:nuc_8_compute_element_cm8i3cb_firmware:*:*:*:*:*:*:*:*
intel nuc_8_compute_element_cm8i5cb_firmware < cbwhl.0094 cpe:2.3:o:intel:nuc_8_compute_element_cm8i5cb_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-33086

cvelogic Threat Intelligence