CVE-2021-21557

highpriority · track · 27EPSS 0.003 · 28 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.35% (28th) EPSS

CVSS 7.2 · high

Is it mine?

32 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of service, arbitrary code execution, or information disclosure in System Management Mode.

cvss

Technical severity, 0–10. One row per scoring source.

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–8.1

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:Lsecondary · ENISA EU

v3.18.1highCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:Lsecondary · security_alert@emc.comexploitability 1.5 · impact 6

v3.16.1mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-20US

affected products (32)

Products and version ranges known to be affected.

Dell PowerEdge BIOS Intel 15Gunspecified → 2.11.2enisa_euvdEU
dell poweredge c4140 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_c4140_firmware:*:*:*:*:*:*:*:*
dell poweredge c6420 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_c6420_firmware:*:*:*:*:*:*:*:*
dell poweredge c6525 firmware< 2.2.4nvdUScpe:2.3:o:dell:poweredge_c6525_firmware:*:*:*:*:*:*:*:*
dell poweredge fc640 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_fc640_firmware:*:*:*:*:*:*:*:*
dell poweredge m640 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_m640_firmware:*:*:*:*:*:*:*:*
dell poweredge m640p firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_m640p_firmware:*:*:*:*:*:*:*:*
dell poweredge mx740c firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_mx740c_firmware:*:*:*:*:*:*:*:*
dell poweredge mx840c firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_mx840c_firmware:*:*:*:*:*:*:*:*
dell poweredge r240 firmware< 2.5.1nvdUScpe:2.3:o:dell:poweredge_r240_firmware:*:*:*:*:*:*:*:*
dell poweredge r340 firmware< 2.5.1nvdUScpe:2.3:o:dell:poweredge_r340_firmware:*:*:*:*:*:*:*:*
dell poweredge r440 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_r440_firmware:*:*:*:*:*:*:*:*
dell poweredge r540 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_r540_firmware:*:*:*:*:*:*:*:*
dell poweredge r640 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_r640_firmware:*:*:*:*:*:*:*:*
dell poweredge r6415 firmware< 1.16.1nvdUScpe:2.3:o:dell:poweredge_r6415_firmware:*:*:*:*:*:*:*:*
dell poweredge r6515 firmware< 2.2.4nvdUScpe:2.3:o:dell:poweredge_r6515_firmware:*:*:*:*:*:*:*:*
dell poweredge r6525 firmware< 2.2.5nvdUScpe:2.3:o:dell:poweredge_r6525_firmware:*:*:*:*:*:*:*:*
dell poweredge r740 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_r740_firmware:*:*:*:*:*:*:*:*
dell poweredge r740xd firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_r740xd_firmware:*:*:*:*:*:*:*:*
dell poweredge r740xd2 firmware< 2.11.2nvdUScpe:2.3:o:dell:poweredge_r740xd2_firmware:*:*:*:*:*:*:*:*

showing 20 of 32

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-06-14modified 2026-06-17

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+11870 more

references (3)

External citations — patches, advisories, analysis.

scry

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