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CVE-2021-21557

MEDIUMCVSS 6.7/10EPSS 0.33%

Last modified

CVE-2021-21557 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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.. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.33%

25.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DellPoweredge R640 Firmware< 2.11.2
DellPoweredge R740 Firmware< 2.11.2
DellPoweredge R740xd Firmware< 2.11.2
DellPoweredge R940 Firmware< 2.11.2
DellPoweredge R540 Firmware< 2.11.2
DellPoweredge R440 Firmware< 2.11.2
DellPoweredge T440 Firmware< 2.11.2
DellPoweredge Xr2 Firmware< 2.11.2
DellPoweredge R740xd2 Firmware< 2.11.2
DellPoweredge R840 Firmware< 2.11.2
DellPoweredge R940xa Firmware< 2.11.2
DellPoweredge T640 Firmware< 2.11.2
DellPoweredge C6420 Firmware< 2.11.2
DellPoweredge Fc640 Firmware< 2.11.2
DellPoweredge M640 Firmware< 2.11.2
DellPoweredge M640p Firmware< 2.11.2
DellPoweredge Mx740c Firmware< 2.11.2
DellPoweredge Mx840c Firmware< 2.11.2
DellPoweredge C4140 Firmware< 2.11.2
DellPoweredge T140 Firmware< 2.5.1
DellPoweredge T340 Firmware< 2.5.1
DellPoweredge R240 Firmware< 2.5.1
DellPoweredge R340 Firmware< 2.5.1
DellPoweredge R6415 Firmware< 1.16.1
DellPoweredge R7415 Firmware< 1.16.1
DellPoweredge R7425 Firmware< 1.16.1
DellPoweredge R6515 Firmware< 2.2.4
DellPoweredge R7515 Firmware< 2.2.4
DellPoweredge R6525 Firmware< 2.2.5
DellPoweredge R7525 Firmware< 2.2.5
DellPoweredge C6525 Firmware< 2.2.4

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21557?
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.
How severe is CVE-2021-21557?
CVE-2021-21557 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21557?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21557?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST