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Alienware M15 R6 Firmware CVE-2021-21571

MEDIUM
Improper Certificate Validation (CWE-295)
2021-06-24 security_alert@emc.com
Denial Of Service Dell Alienware M15 R6 Firmware Latitude 5310 Firmware Latitude 5310 2 In 1 Firmware Latitude 5320 Firmware Latitude 5410 Firmware Latitude 5411 Firmware Latitude 5420 Firmware Latitude 5421 Firmware Latitude 5510 Firmware Latitude 5511 Firmware Latitude 5520 Firmware Latitude 5521 Firmware Chengming 3990 Firmware Chengming 3991 Firmware Inspiron 14 5418 Firmware Latitude 7210 2 In 1 Firmware Latitude 7310 Firmware Latitude 7320 Firmware Latitude 7320 Detachable Firmware Latitude 7410 Firmware Latitude 7420 Firmware Latitude 7520 Firmware Latitude 9410 Firmware Latitude 9420 Firmware Latitude 9520 Firmware Precision 3640 Firmware Precision 5550 Firmware Precision 5560 Firmware Precision 5760 Firmware Precision 7550 Firmware Precision 7560 Firmware Precision 7750 Firmware Precision 7760 Firmware Inspiron 15 5518 Firmware Inspiron 15 7510 Firmware Inspiron 3501 Firmware Inspiron 3880 Firmware Inspiron 3881 Firmware Inspiron 3891 Firmware Inspiron 5301 Firmware Inspiron 5401 Firmware Inspiron 5401 Aio Firmware Inspiron 5402 Firmware Inspiron 5409 Firmware Inspiron 5502 Firmware Optiplex 3080 Firmware Optiplex 3280 All In One Firmware Optiplex 5080 Firmware Optiplex 5090 Tower Firmware Optiplex 7080 Firmware Optiplex 7090 Tower Firmware Optiplex 7480 All In One Firmware Optiplex 7490 All In One Firmware Vostro 14 5410 Firmware Vostro 15 5510 Firmware Vostro 15 7510 Firmware Vostro 3400 Firmware Vostro 3500 Firmware Vostro 3501 Firmware Vostro 3681 Firmware Vostro 3690 Firmware Vostro 3881 Firmware Vostro 3888 Firmware Vostro 3890 Firmware Vostro 5301 Firmware Latitude 3320 Firmware Latitude 3410 Firmware Latitude 3420 Firmware Latitude 3510 Firmware Latitude 3520 Firmware Optiplex 7780 All In One Firmware Latitude 3120 Firmware Inspiron 7706 2 In 1 Firmware Inspiron 7501 Firmware Inspiron 7500 Firmware Inspiron 7400 Firmware Inspiron 7306 2 In 1 Firmware Inspiron 7300 Firmware Inspiron 5509 Firmware Vostro 7500 Firmware Vostro 5890 Firmware Vostro 5880 Firmware Vostro 5502 Firmware Vostro 5402 Firmware Precision 3440 Firmware Precision 3450 Firmware Precision 3550 Firmware Precision 3551 Firmware Precision 3560 Firmware Precision 3561 Firmware Xps 13 9310 Firmware Xps 15 9500 Firmware Xps 15 9510 Firmware Xps 17 9700 Firmware Xps 17 9710 Firmware G15 5510 Firmware G15 5511 Firmware Xps 13 9305 Firmware Inspiron 5300 Firmware Inspiron 7300 2 In 1 Firmware Inspiron 7500 2 In 1 Firmware Latitude 9510 Firmware Vostro 5300 Firmware G3 3500 Firmware G5 5500 Firmware G7 7500 Firmware G7 7700 Firmware Inspiron 5310 Firmware Inspiron 5400 2 In 1 Firmware Inspiron 5400 Aio Firmware Inspiron 5406 2N1 Firmware Inspiron 5408 Firmware Inspiron 5410 2 In 1 Firmware Inspiron 5501 Firmware Inspiron 5508 Firmware Inspiron 7506 Firmware Inspiron 7610 Firmware Inspiron 7700 Aio Firmware Latitude 5320 2 In 1 Firmware Optiplex 3090 Uff Firmware Optiplex 5490 Aio Firmware Optiplex 7090 Uff Firmware Precision 17 M5750 Firmware Precision 3650 Mt Firmware Vostro 5310 Firmware Vostro 5401 Firmware Vostro 5501 Firmware Xps 13 2In1 9310 Firmware
6.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-295
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V12 - Secure Communication Certificate validation
Impact

CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. 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 0.6% exploitation probability (EPSS)

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AnalysisAI

Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper certificate validation vulnerability. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required. 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.

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Technical ContextAI · show details

This vulnerability is classified under CWE-295. Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper certificate validation vulnerability. A remote unauthenticated attacker may exploit this vulnerability using a person-in-the-middle attack which may lead to a denial of service and payload tampering. Affected products include: Dell Alienware M15 R6 Firmware, Dell Chengming 3990 Firmware, Dell Chengming 3991 Firmware, Dell G15 5510 Firmware, Dell G15 5511 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 6.5 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

DescriptionNVD

Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper certificate validation vulnerability. A remote unauthenticated attacker may exploit this vulnerability using a person-in-the-middle attack which may lead to a denial of service and payload tampering.

Threat Intelligence Overview

EPSS Score
0.6%
Top 54% 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 0.6%
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
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

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

Affected Products (CPE)NVD

cpe:2.3:o:dell:alienware_m15_r6_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:chengming_3990_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:chengming_3991_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g15_5510_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g15_5511_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g3_3500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g5_5500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g7_7500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:g7_7700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_14_5418_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_15_5518_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_15_7510_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3501_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3880_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3881_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_3891_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5301_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5310_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:inspiron_5400_2-in-1_firmware:*:*:*:*:*:*:*:*
+ 108 more

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Same weakness CWE-295 – Improper Certificate Validation

View all
CVE-2026-85102 CRITICAL POC
9.8
CVE-2015-3152 MEDIUM POC
5.9
CVE-2017-2800 CRITICAL POC
9.8
CVE-2014-1266 HIGH POC
7.4
CVE-2022-47758 CRITICAL POC
9.8
CVE-2025-68121 CRITICAL POC
10.0
CVE-2025-29331 CRITICAL POC
9.8
CVE-2025-32878 CRITICAL POC
9.8

Same technique Denial Of Service

View all
CVE-2015-5119 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2011-0611 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2011-0609 HIGH POC
7.8

References

Advisories & patches
ADVISORY https://www.dell.com/support/kbdoc/en-us/000188682

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