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Nuc Kit Nuc8I7Bek Firmware CVE-2021-33086

MEDIUM
Out-of-bounds Write (CWE-787)
2021-11-17 secure@intel.com
Buffer Overflow Denial Of Service Memory Corruption Intel Nuc Kit Nuc8I7Bek Firmware Nuc Kit Nuc8I7Hnk Firmware Nuc 8 Mainstream G Kit Nuc8I7Inh Firmware Nuc 8 Mainstream G Kit Nuc8I5Inh Firmware Nuc 8 Mainstream G Mini Pc Nuc8I7Inh Firmware Nuc 8 Rugged Kit Nuc8Cchkr Firmware Nuc Board Nuc8Cchb Firmware Nuc Kit Nuc7I3Dnke Firmware Nuc Kit Nuc7I3Dnhe Firmware Nuc Board Nuc7I3Dnbe Firmware Nuc Kit Nuc7Cjyh Firmware Nuc Kit Nuc7Pjyh Firmware Nuc Kit Nuc6Cays Firmware Nuc Kit Nuc6Cayh Firmware Nuc 8 Mainstream G Mini Pc Nuc8I5Inh Firmware Nuc 8 Pro Board Nuc8I3Pnb Firmware Nuc 8 Pro Kit Nuc8I3Pnh Firmware Nuc 8 Pro Kit Nuc8I3Pnk Firmware Nuc 9 Pro Kit Nuc9V7Qnx Firmware Nuc 9 Pro Kit Nuc9Vxqnx Firmware Nuc M15 Laptop Kit Lapbc510 Firmware Nuc M15 Laptop Kit Lapbc710 Firmware Nuc 11 Compute Element Cm11Ebi38W Firmware Nuc 11 Compute Element Cm11Ebi58W Firmware Nuc 11 Compute Element Cm11Ebi716W Firmware Nuc 11 Performance Kit Nuc11Pahi3 Firmware Nuc 11 Performance Kit Nuc11Pahi5 Firmware Nuc 11 Performance Kit Nuc11Pahi7 Firmware Nuc 11 Performance Kit Nuc11Paki3 Firmware Nuc 11 Performance Kit Nuc11Paki5 Firmware Nuc 11 Performance Kit Nuc11Paki7 Firmware Nuc 11 Performance Mini Pc Nuc11Paqi50Wa Firmware Nuc 11 Performance Mini Pc Nuc11Paqi70Qa Firmware Nuc 11 Pro Board Nuc11Tnbi3 Firmware Nuc 11 Pro Board Nuc11Tnbi5 Firmware Nuc 11 Pro Board Nuc11Tnbi7 Firmware Nuc 11 Pro Kit Nuc11Tnhi3 Firmware Nuc 11 Pro Kit Nuc11Tnhi30L Firmware Nuc 11 Pro Kit Nuc11Tnhi30P Firmware Nuc 11 Pro Kit Nuc11Tnhi5 Firmware Nuc 11 Pro Kit Nuc11Tnhi50L Firmware Nuc 11 Pro Kit Nuc11Tnhi50W Firmware Nuc 11 Pro Kit Nuc11Tnhi7 Firmware Nuc 11 Pro Kit Nuc11Tnhi70L Firmware Nuc 11 Pro Kit Nuc11Tnhi70Q Firmware Nuc 11 Pro Kit Nuc11Tnki3 Firmware Nuc 11 Pro Kit Nuc11Tnki5 Firmware Nuc 11 Pro Kit Nuc11Tnki7 Firmware Nuc 11 Enthusiast Kit Nuc11Phki7C Firmware Nuc 11 Enthusiast Mini Pc Nuc11Phki7Caa Firmware Nuc 10 Performance Kit Nuc10I3Fnh Firmware Nuc 10 Performance Kit Nuc10I3Fnhf Firmware Nuc 10 Performance Kit Nuc10I3Fnk Firmware Nuc 10 Performance Kit Nuc10I5Fnh Firmware Nuc 10 Performance Kit Nuc10I5Fnhf Firmware Nuc 10 Performance Kit Nuc10I5Fnhj Firmware Nuc 10 Performance Kit Nuc10I5Fnk Firmware Nuc 10 Performance Kit Nuc10I5Fnkp Firmware Nuc 10 Performance Kit Nuc10I7Fnh Firmware Nuc 10 Performance Kit Nuc10I7Fnhc Firmware Nuc 10 Performance Kit Nuc10I7Fnk Firmware Nuc 10 Performance Kit Nuc10I7Fnkp Firmware Nuc 9 Pro Compute Element Nuc9V7Qnb Firmware Nuc 9 Pro Compute Element Nuc9Vxqnb Firmware Nuc Kit Nuc8I7Hvk Firmware Nuc 8 Compute Element Cm8Ccb Firmware Nuc 8 Compute Element Cm8I3Cb Firmware Nuc 8 Compute Element Cm8I5Cb Firmware Nuc 8 Compute Element Cm8I7Cb Firmware Nuc 8 Compute Element Cm8Pcb Firmware Nuc 11 Compute Element Cm11Ebc4W Firmware Nuc 10 Performance Kit Nuc10I3Fnhfa Firmware Nuc 10 Performance Kit Nuc10I3Fnhja Firmware Nuc 10 Performance Kit Nuc10I5Fnhca Firmware Nuc 10 Performance Kit Nuc10I5Fnhja Firmware Nuc 10 Performance Kit Nuc10I5Fnkpa Firmware Nuc 10 Performance Kit Nuc10I7Fnhaa Firmware Nuc 10 Performance Kit Nuc10I7Fnhja Firmware Nuc 10 Performance Kit Nuc10I7Fnkpa Firmware Nuc 8 Business Nuc8I7Hnkqc Firmware Nuc 8 Enthusiast Nuc8I7Hvkva Firmware Nuc 8 Enthusiast Nuc8I7Hvkvaw Firmware Nuc 8 Enthusiast Nuc8I7Behga Firmware Nuc 8 Enthusiast Nuc8I7Bekqa Firmware Nuc 8 Home Nuc8I3Behfa Firmware Nuc 8 Home Nuc8I5Behfa Firmware Nuc 8 Home Nuc8I5Bekpa Firmware Nuc Kit Nuc8I3Beh Firmware Nuc Kit Nuc8I3Behs Firmware Nuc Kit Nuc8I3Bek Firmware Nuc Kit Nuc8I5Beh Firmware Nuc Kit Nuc8I5Behs Firmware Nuc Kit Nuc8I5Bek Firmware Nuc Kit Nuc8I7Beh Firmware Nuc 8 Home Nuc8I3Cysm Firmware Nuc 8 Home Nuc8I3Cysn Firmware Nuc 7 Essential Nuc7Cjysal Firmware Nuc 7 Business Nuc7I3Dnhnc Firmware Nuc 7 Business Nuc7I3Dnktc Firmware Nuc 7 Business Nuc7I5Dnkpc Firmware Nuc 7 Business Nuc7I5Dnbe Firmware Nuc 7 Business Nuc7I5Dnhe Firmware Nuc 7 Business Nuc7I5Dnke Firmware
5.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required.

Exploit ScenarioDerived

A local attacker with access to the system could write data beyond allocated buffer boundaries leading to code execution or crashes.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAI

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. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. 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. Affected products include: Intel Nuc M15 Laptop Kit Lapbc510 Firmware, Intel Nuc M15 Laptop Kit Lapbc710 Firmware, Intel Nuc 11 Compute Element Cm11Ebc4W Firmware, Intel Nuc 11 Compute Element Cm11Ebi38W Firmware, Intel Nuc 11 Compute Element Cm11Ebi58W Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

DescriptionNVD

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.

Threat Intelligence Overview

EPSS Score
0.2%
Top 89% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:o:intel:nuc_m15_laptop_kit_lapbc510_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_m15_laptop_kit_lapbc710_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_compute_element_cm11ebc4w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_compute_element_cm11ebi38w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_compute_element_cm11ebi58w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_compute_element_cm11ebi716w_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_kit_nuc11pahi3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_kit_nuc11pahi5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_kit_nuc11pahi7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_kit_nuc11paki3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_kit_nuc11paki5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_kit_nuc11paki7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_mini_pc_nuc11paqi50wa_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_performance_mini_pc_nuc11paqi70qa_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_pro_board_nuc11tnbi3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_pro_board_nuc11tnbi5_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_pro_board_nuc11tnbi7_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi30l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:nuc_11_pro_kit_nuc11tnhi30p_firmware:*:*:*:*:*:*:*:*
+ 83 more

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