All vulnerabilities
CVE-2023-21674

Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability

Microsoft WindowsOperating systems
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 10 Jan 2023CISA KEV
Exploit odds (EPSS)41.0%Chance of exploitation activity in the next 30 days, higher than 98% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in10.0.17763.3887Also 10.0.20348.1487, 10.0.19042.2486 and 7 moreCVE List
Federal deadline31 Jan 2023Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

  • 10.0.17763.3887Windows 10 Version 1809CVE List
  • 10.0.17763.3887Windows Server 2019CVE List
  • 10.0.17763.3887Windows Server 2019 (Server Core installation)CVE List
  • 10.0.20348.1487Windows Server 2022CVE List
  • 10.0.19042.2486Windows 10 Version 20H2CVE List
  • 10.0.22000.1455Windows 11 version 21H2CVE List
Show all 16 fixed versions
  • 10.0.19044.2486Windows 10 Version 21H2CVE List
  • 10.0.22621.1105Windows 11 version 22H2CVE List
  • 10.0.19045.2486Windows 10 Version 22H2CVE List
  • 10.0.10240.19685Windows 10 Version 1507CVE List
  • 10.0.14393.5648Windows 10 Version 1607CVE List
  • 10.0.14393.5648Windows Server 2016CVE List
  • 10.0.14393.5648Windows Server 2016 (Server Core installation)CVE List
  • 6.3.9600.20778Windows 8.1CVE List
  • 6.3.9600.20778Windows Server 2012 R2CVE List
  • 6.3.9600.20778Windows Server 2012 R2 (Server Core installation)CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 10 Jan 2023, 00:00 UTCPublishedCVE List
  2. 10 Jan 2023Added to CISA KEVCISA KEV

Description

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

Text from CVE List

Affected versions 17

  • Windows 10 Version 1809affected: 10.0.17763.0 before 10.0.17763.3887CVE List
  • Windows 10 Version 1809affected: 10.0.0 before 10.0.17763.3887CVE List
  • Windows Server 2019affected: 10.0.17763.0 before 10.0.17763.3887CVE List
  • Windows Server 2019 (Server Core installation)affected: 10.0.17763.0 before 10.0.17763.3887CVE List
  • Windows Server 2022affected: 10.0.20348.0 before 10.0.20348.1487CVE List
  • Windows 10 Version 20H2affected: 10.0.0 before 10.0.19042.2486CVE List
  • Windows 11 version 21H2affected: 10.0.0 before 10.0.22000.1455CVE List
  • Windows 10 Version 21H2affected: 10.0.19043.0 before 10.0.19044.2486CVE List
  • Windows 11 version 22H2affected: 10.0.22621.0 before 10.0.22621.1105CVE List
  • Windows 10 Version 22H2affected: 10.0.19045.0 before 10.0.19045.2486CVE List
  • Windows 10 Version 1507affected: 10.0.10240.0 before 10.0.10240.19685CVE List
  • Windows 10 Version 1607affected: 10.0.14393.0 before 10.0.14393.5648CVE List
  • Windows Server 2016affected: 10.0.14393.0 before 10.0.14393.5648CVE List
  • Windows Server 2016 (Server Core installation)affected: 10.0.14393.0 before 10.0.14393.5648CVE List
  • Windows 8.1affected: 6.3.0 before 6.3.9600.20778CVE List
  • Windows Server 2012 R2affected: 6.3.9600.0 before 6.3.9600.20778CVE List
  • Windows Server 2012 R2 (Server Core installation)affected: 6.3.9600.0 before 6.3.9600.20778CVE List

References 4