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TI-2025-20324 Aliases CVE-2025-27489GHSA-82xw-6f7x-r595

Azure Local Elevation of Privilege Vulnerability

Priority LOW 37CWE-20Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00624 50th percentileScored 2026-11-07
Fix Fixed Microsoft: 1 update

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftAzure Stack HCI OS10.0.25398.0 to before 10.0.25398.148610.0.25398.1486Patch availableCNA
MicrosoftAzure Stack OS HCI10.0.20349.0 to before 10.0.20348.332810.0.20348.3328Patch availableCNA
  • Azure Stack HCI OS VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1486 Fixed in 10.0.25398.1486 Patch available CNA
  • Azure Stack OS HCI VendorMicrosoft Affected 10.0.20349.0 to before 10.0.20348.3328 Fixed in 10.0.20348.3328 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:azure_stack_hci_22h2:*:*:*:*:*:*:*:*before 10.0.20348.3328VulnerableMicrosoft
cpe:2.3:o:microsoft:azure_stack_hci_23h2:*:*:*:*:*:*:*:*before 10.0.25398.1486VulnerableMicrosoft
  • cpe:2.3:o:microsoft:azure_stack_hci_22h2:*:*:*:*:*:*:*:* Versions before 10.0.20348.3328 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:azure_stack_hci_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1486 Vulnerable ·Microsoft

Remediation

Microsoft 1 update

  • KB5055526
    Security Update
    • Azure Stack HCI OS 22H2 10.0.20348.3328
    • Windows Server 2022 10.0.20348.3453
    • Windows Server 2022 (Server Core installation) 10.0.20348.3453

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Azure Stack HCI OS 23H2Fixed 10.0.25398.1486 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27489
  2. 2026-10-03 Alias added: GHSA-82xw-6f7x-r595
  3. 2026-11-04 EPSS moved to the 50th–90th percentile

References

Patch 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences