CVE-2021-21555
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I. Basic Information for CVE-2021-21555
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server BIOS contain a heap-based buffer overflow vulnerability in systems with NVDIMM-N installed. 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 UEFI or BIOS Preboot Environment.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Dell PowerEdge 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dell PowerEdge Server BIOS是戴尔（Dell）的一款系统更新驱动程序。 Dell PowerEdge 存在安全漏洞，攻击者可利用该漏洞导致拒绝服务、任意代码执行或在UEFI或BIOS预引导环境中泄露信息。以下产品及版本受到影响：Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and T640 Server。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Dell | PowerEdge BIOS Intel 15G | unspecified ~ 2.11.2 | - |
II. Public POCs for CVE-2021-21555
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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- https://www.dell.com/support/kbdoc/000187958x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-21555
Same Patch Batch · Dell · 2021-06-14 · 4 CVEs total
| CVE-2021-21557 | 8.1 HIGH | Dell PowerEdge Server 缓冲区错误漏洞 |
| CVE-2021-21556 | 6.1 MEDIUM | Dell PowerEdge 缓冲区错误漏洞 |
| CVE-2021-21554 | 6.1 MEDIUM | Dell PowerEdge 多款产品缓冲区错误漏洞 |
IV. Related Vulnerabilities
Same weakness: CWE-122
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OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow - CVE-2026-42309
Pillow: Heap buffer overflow with nested list coordinates - CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading
V. Comments for CVE-2021-21555
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