HIGHCVSS v3.1 8.8Actively exploited · CISA KEV since 2023-01-10Vulnerability

CVE-2023-21674

Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.

Properties

Euvd product
Windows 11 version 21H2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016 (Server Core installation), Windows Server 2022, Windows 10 Version 21H2, Windows Server 2019, Windows Server 2012 R2, Windows 10 Version 1507, Windows 10 Version 1809, Windows 11 version 22H2, Windows Server 2019 (Server Core installation), Windows Server 2016, Windows 10 Version 22H2, Windows 10 Version 1607, Windows 8.1, Windows 10 Version 20H2
Vulnerability name
Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability
First seen
2025-10-21T23:15:28+00:00
Cvss score
8.8
Epss score
0.40987
Last seen
2026-10-19T12:00:27+00:00
Due date
2023-01-31
Euvd assigner
microsoft
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2023-01-10T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2023-01-10
Score
8.8
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Microsoft
Cvss vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.8

Related Entities (16)

AFFECTS_PRODUCT (13)

→[Product]cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*

DESCRIBES (1)

←[KEVEntry]Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Use After Free

INVOLVES (1)

←[Signal]kev_added · 2023-01-10

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CVE-2023-21674 (CVSS v3.1 8.8) — Ninja Signal Threat Intelligence | Ninja Signal