CVE-2021-42302: Azure RTOS Elevation of Privilege Vulnerability

Severity: high (CVSS 7.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-10 · updated 2026-08-19
Weakness: CWE-269

Description

Azure RTOS Elevation of Privilege Vulnerability

Affected products

Microsoft Azure Real Time Operating System: before 6.1.9 — fixed in 6.1.9
Microsoft Azure Real Time Operating System: from 6.0.0 before 6.1.9 — fixed in 6.1.9

How to fix

Upgrade to a fixed version: Microsoft Azure Real Time Operating System 6.1.9; Microsoft Azure Real Time Operating System 6.1.9. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42302
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42302

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