What is the CVSS score of CVE-2017-5721?

CVE-2017-5721 has a CVSS 3.0 base score of 7.5 (High). CVSS vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 4.0%.

Is there a patch available for CVE-2017-5721?

Yes, a patch is available for CVE-2017-5721. Update the affected software to the latest version immediately.

Nuc7I7Bnh Firmware CVE-2017-5721

HIGH

Improper Input Validation (CWE-20)

2017-10-11 secure@intel.com

RCE Intel Nuc7I7Bnh Firmware Nuc7I5Bnh Firmware Nuc7I5Bnk Firmware Nuc7I3Bnh Firmware Nuc7I3Bnk Firmware

7.5

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-20 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V2 - Validation and Business Logic Input validation, allowlisting
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: local attack vector, high complexity, high privileges required, no user interaction not required. EPSS exploitation probability: 3.99%.
Exploit ScenarioDerived	Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 4.0% exploitation probability (EPSS)

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AnalysisAI

Insufficient input validation in system firmware for Intel NUC7i3BNK, NUC7i3BNH, NUC7i5BNK, NUC7i5BNH, NUC7i7BNH versions BN0049 and below allows local attackers to execute arbitrary code via. Rated high severity (CVSS 7.5).

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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 under CWE-20. Insufficient input validation in system firmware for Intel NUC7i3BNK, NUC7i3BNH, NUC7i5BNK, NUC7i5BNH, NUC7i7BNH versions BN0049 and below allows local attackers to execute arbitrary code via manipulation of memory. Affected products include: Intel Nuc7I7Bnh Firmware, Intel Nuc7I5Bnh Firmware, Intel Nuc7I5Bnk Firmware, Intel Nuc7I3Bnh Firmware, Intel Nuc7I3Bnk Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Threat Intelligence Overview

EPSS Score

4.0%

Top 12% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 HIGH

CISA KEV No

Public POC No

EPSS 4.0%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +4

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)CVE.org

cpe:2.3:o:intel:nuc7i7bnh_firmware:ayaplcel.86a.0041:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:bnkbl357.86a.0052:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:ccsklm5v.86a.0052:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:ccsklm30.86a.0052:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:dnkbli5v.86a.0026:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:dnkbli30.86a.0026:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:kyskli70.86a.0050:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:rybdwi35.86a.0366:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:syskli35.86a.0062:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i7bnh_firmware:tybyt20h.86a.0015:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:ayaplcel.86a.0041:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:bnkbl357.86a.0052:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:ccsklm5v.86a.0052:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:ccsklm30.86a.0052:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:dnkbli5v.86a.0026:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:dnkbli30.86a.0026:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:kyskli70.86a.0050:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:rybdwi35.86a.0366:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:syskli35.86a.0062:*:*:*:*:*:*:*

cpe:2.3:o:intel:nuc7i5bnh_firmware:tybyt20h.86a.0015:*:*:*:*:*:*:*

+ 30 more

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References

Advisories & patches

PATCH https://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00084&languageid=en-fr

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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