CVE-2025-27489: Azure Local Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Apr

Released

2025-04-08

Last Updated

2025-04-09

EPSS Score

0.94% (percentile: 76.2%)

Description

Improper input validation in Azure Local allows an authorized attacker to elevate privileges locally.

FAQ

What privileges would an attacker gain by successfully exploiting this vulnerability? An attacker who successfully exploited this vulnerability could load a non-Microsoft DLL into an enclave, potentially leading to code execution within the context of the target enclave. Are the updates for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems currently available? Yes. As of April 9, 2025, the security update (5055547) for Windows 10 for x64-based Systems and Windows 10 for 32-bit Systems are available. Customers running Windows 10 should ensure the update is installed to be protected from this vulnerability.

Affected Products (2)

Azure

• Azure Stack HCI OS 22H2
• Azure Stack HCI OS 23H2

Security Updates (2)

• 5055526
• Release Notes

Acknowledgments

Microsoft Offensive Research & Security Engineering

Revision History

• 2025-04-08: Information published.
• 2025-04-09: The security updates for Windows 10 for 32-bit Systems and Windows 10 for x64-based Systems are now available. See the Security Updates table for more information.