How severe is CVE-2020-12336?

CVE-2020-12336 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-12336 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12336?

CVE-2020-12336 primarily affects Intel Nuc 8 Mainstream-g Kit Nuc8i5inh Firmware. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12336?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-12336 published?

CVE-2020-12336 was published on 2020-11-12 and last updated on 2026-06-17.

CVE-2020-12336

CVE-2020-12336 is a high-severity vulnerability in Intel Nuc 8 Mainstream-g Kit Nuc8i5inh Firmware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1188.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1188
Affected product: Intel Nuc 8 Mainstream-g Kit Nuc8i5inh Firmware
Published: 2020-11-12
Last modified: 2026-06-17

Description

Insecure default variable initialization in firmware for some Intel(R) NUCs may allow an authenticated user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2020-12336?: Insecure default variable initialization in firmware for some Intel(R) NUCs may allow an authenticated user to potentially enable escalation of privilege via local access.
How severe is CVE-2020-12336?: CVE-2020-12336 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-12336 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12336?: CVE-2020-12336 primarily affects Intel Nuc 8 Mainstream-g Kit Nuc8i5inh Firmware. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12336?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-12336 published?: CVE-2020-12336 was published on 2020-11-12 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00414

Affected products (23)

cpe:2.3:o:intel:nuc_8_mainstream-g_kit_nuc8i5inh_firmware:inwhl357.0036:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_mainstream-g_kit_nuc8i7inh_firmware:inwhl357.0036:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_mainstream-g_mini_pc_nuc8i5inh_firmware:inwhl357.0036:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_mainstream-g_mini_pc_nuc8i7inh_firmware:inwhl357.0036:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_pro_board_nuc8i3pnb_firmware:pnwhl357.0037:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_pro_kit_nuc8i3pnh_firmware:pnwhl357.0037:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_pro_kit_nuc8i3pnk_firmware:pnwhl357.0037:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_pro_mini_pc_nuc8i3pnk_firmware:pnwhl357.0037:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_8_rugged_kit_nuc8cchkr_firmware:chaplcel.0049:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_9_pro_kit_nuc9v7qnx_firmware:qncflx70.34:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_9_pro_kit_nuc9vxqnx_firmware:qncflx70.34:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_board_h27002-400_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_board_h27002-401_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_board_h27002-402_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_board_h27002-404_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_board_h27002-500_firmware:tybyt20h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_board_nuc8cchb_firmware:chaplcel.0049:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_kit_h26998-401_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_kit_h26998-402_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_kit_h26998-403_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_kit_h26998-404_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_kit_h26998-405_firmware:tybyt10h.86a:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_kit_h26998-500_firmware:tybyt20h.86a:*:*:*:*:*:*:*

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