CVE-2021-21557
8.1 · HIGHOverview
CVE-2021-21557 is a high-severity vulnerability affecting dell poweredge_r640_firmware. It was published on June 14, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from dell. Update poweredge_r640_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| dell | poweredge_r640_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r740_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r740xd_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r940_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r540_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r440_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_t440_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_xr2_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r740xd2_firmware | >= 0, < 2.11.2 | Affected |
| dell | poweredge_r840_firmware | >= 0, < 2.11.2 | Affected |
Frequently Asked Questions
What is CVE-2021-21557?
CVE-2021-21557 is a high-severity vulnerability affecting dell poweredge_r640_firmware. It was published on June 14, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2021-21557?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-21557?
Check the references section for vendor advisories and patches from dell. Update poweredge_r640_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21557?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21557 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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