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CVE-2023-21674

HIGH · CVSS 8.8 · Analyzed

Published: 2023-01-10 · Updated: 2026-06-17 · Source: NVD

Vulnerability overview

Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

Severity and scoring

CVSS score
8.8 · HIGH
CVSS version
3.1
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-416

CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.

Known exploitation and remediation

Listed in CISA’s Known Exploited Vulnerabilities catalog.

Affected product
Microsoft · Windows
Added to catalog
2023-01-10
Required action
Apply updates per vendor instructions.
CISA remediation due date
2023-01-31

CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.

Verify affected versions and patch availability in the vendor advisory before making changes.

Affected products and versions

  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.10240.19685

  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.14393.5648

  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.17763.3887

  • cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.19042.2486

  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.19044.2486

  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.19045.2486

  • cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.22000.1455

  • cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.22621.1105

  • cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*

  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.14393.5648

  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.17763.3887

  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*

    Before (exclusive): 10.0.20348.1487

These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.

Advisories and references

Explore official sources

Read the official NVD record ↗

Explore the CISA catalog ↗

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