CVE-2021-21505

Name: CVE-2021-21505
Creator: NVD / NIST
Published: 2021-05-06T13:15:11.2+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.39%

Last modified Jun 17, 2026

CVE-2021-21505 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Dell EMC Integrated System for Microsoft Azure Stack Hub, versions 1906 – 2011, contain an undocumented default iDRAC account. A remote unauthenticated attacker, with the knowledge of the default credentials, could potentially exploit this to log in to the system to gain root privileges.. EPSS estimates a 2.39% chance of exploitation in the next 30 days.

Description

Dell EMC Integrated System for Microsoft Azure Stack Hub, versions 1906 – 2011, contain an undocumented default iDRAC account. A remote unauthenticated attacker, with the knowledge of the default credentials, could potentially exploit this to log in to the system to gain root privileges.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.39%

81.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dell	Emc Integrated System For Microsoft Azure Stack Hub Firmware	>= 1906, <= 2011

References

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21505?

How severe is CVE-2021-21505?

CVE-2021-21505 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21505?

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-2021-21505?

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

Scan your code now

Source: NVD / NIST