CVE tracker / CVE-2025-27489
CVE-2025-27489
CVE-2025-27489 is the Azure Local Elevation of Privilege Vulnerability. Microsoft rates it Important, CVSS 7.8. It is not in CISA's Known Exploited Vulnerabilities catalog. Published April 8, 2025.
Risk summary
HighElevation of Privilege
7.8
CVSS v3 base
0.6%
EPSS: chance of exploitation in 30 days
High
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Improper input validation in Azure Local allows an authorized attacker to elevate privileges locally.”
How to fix it
Microsoft lists 2 affected products and the update that fixes each:
- KB5055526 · fixed build 10.0.20348.3328
Azure Stack HCI OS 22H2 - Release Notes · fixed build 10.0.25398.1486
Azure Stack HCI OS 23H2
What Microsoft changed
- April 9, 2025: 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.
- April 8, 2025: Information published.
Details
- Weakness
- CWE-20: Improper Input Validation
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- April 8, 2025
- Last revised
- April 9, 2025
Get told when this changes
Senserva Watch emails Microsoft security and patch alerts when something moves: a new exploitation report, a revised fix, a known issue. Free, one email address.
References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.