What is the CVSS score of CVE-2021-36284?

CVE-2021-36284 has a CVSS 3.1 base score of 4.4 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.2%.

Latitude 5310 2 In 1 Firmware CVE-2021-36284

MEDIUM

Improper Restriction of Excessive Authentication Attempts (CWE-307)

2021-09-28 security_alert@emc.com

Authentication Bypass Dell Latitude 5310 2 In 1 Firmware Latitude 5320 Firmware Latitude 5400 Firmware Latitude 5411 Firmware Latitude 5500 Firmware Latitude 5511 Firmware Latitude 5520 Firmware Latitude 7212 Rugged Extreme Tablet Firmware Latitude 7280 Firmware Latitude 7320 Firmware Latitude 7420 Firmware Latitude 7480 Firmware Latitude 9410 Firmware Latitude 9520 Firmware Optiplex 3080 Firmware Latitude 7370 Firmware Latitude 9510 Firmware Optiplex 3280 Aio Firmware Optiplex 7480 Aio Firmware Precision 3640 Tower Firmware Precision 3551 Ffirmware

4.4

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-307 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Brute-force prevention, rate limiting
Impact	CVSS score of 4.4 (MEDIUM). Attack characteristics: local attack vector, low complexity, high privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

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

Dell BIOS contains an Improper Restriction of Excessive Authentication Attempts vulnerability. Rated medium severity (CVSS 4.4), 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. 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-307. Dell BIOS contains an Improper Restriction of Excessive Authentication Attempts vulnerability. A local authenticated malicious administrator could exploit this vulnerability to bypass excessive admin password attempt mitigations in order to carry out a brute force attack. Affected products include: Dell Latitude 5310 2-In-1 Firmware, Dell Latitude 5320 Firmware, Dell Latitude 5400 Firmware, Dell Latitude 5411 Firmware, Dell Latitude 5500 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.4 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionNVD

Dell BIOS contains an Improper Restriction of Excessive Authentication Attempts vulnerability. A local authenticated malicious administrator could exploit this vulnerability to bypass excessive admin password attempt mitigations in order to carry out a brute force attack.

Threat Intelligence Overview

EPSS Score

0.2%

Top 87% exploitable

Data Quality

2 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 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

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +22

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:o:dell:latitude_5310_2-in-1_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_5320_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_5400_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_5411_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_5500_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_5520_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_5511_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_7212_rugged_extreme_tablet_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_7280_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_7320_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_7370_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_7420_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_7480_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_9410_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_9510_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:latitude_9520_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:optiplex_3080_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:optiplex_3280_aio_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:optiplex_7480_aio_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:dell:precision_3551_ffirmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY https://www.dell.com/support/kbdoc/000191495

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