CVE-2021-27080

Name: CVE-2021-27080
Creator: NVD / NIST
Published: 2021-03-11T16:15:18.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-27080 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. Azure Sphere Unsigned Code Execution Vulnerability. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

Azure Sphere Unsigned Code Execution Vulnerability

Metrics

CVSS 3.1

9.3/10

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

EPSS Probability

1.22%

64.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Azure Sphere	All versions

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27080Patch, Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1250Exploit, Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27080Patch, Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1250Exploit, Third Party Advisory

Timeline

Published: Mar 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27080?

Azure Sphere Unsigned Code Execution Vulnerability

How severe is CVE-2021-27080?

CVE-2021-27080 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27080?

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-2021-27080?

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

Scan your code now

Source: NVD / NIST