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Medium severity · published Jun 14, 2021
CVE-2021-21557
Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability
6.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PC
Poweredge C4140 Firmware · Dell
before 2.11.2 · source: NVD
PC
Poweredge C6420 Firmware · Dell
before 2.11.2 · source: NVD
PC
Poweredge C6525 Firmware · Dell
before 2.2.4 · source: NVD
PF
Poweredge Fc640 Firmware · Dell
before 2.11.2 · source: NVD
PM
Poweredge M640 Firmware · Dell
before 2.11.2 · source: NVD
PM
Poweredge M640p Firmware · Dell
before 2.11.2 · source: NVD
PM
Poweredge Mx740c Firmware · Dell
before 2.11.2 · source: NVD
PM
Poweredge Mx840c Firmware · Dell
before 2.11.2 · source: NVD
PR
Poweredge R240 Firmware · Dell
before 2.5.1 · source: NVD
PR
Poweredge R340 Firmware · Dell
before 2.5.1 · source: NVD
PR
Poweredge R440 Firmware · Dell
before 2.11.2 · source: NVD
PR
Poweredge R540 Firmware · Dell
before 2.11.2 · source: NVD
Affected product
PC
Poweredge C4140 Firmware
Dell
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21557
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21557
Patch
https://www.dell.com/support/kbdoc/000187958
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