CVE-2023-21674
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
- Record
CVE-2023-21674- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2023-25841
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
- Record
EUVD-2023-25841- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hqxf-h392-6m7w
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability.
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability.
- Record
GHSA-hqxf-h392-6m7w- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability
Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.
- Record
CVE-2023-21674- Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
- Record
CVE-2023-21674- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
Affected products
- microsoft windows
- microsoft windows 10 version 1507
- microsoft windows 10 version 1607
- microsoft windows 10 version 1809
- microsoft windows 10 version 20h2
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 21h2
- microsoft windows 11 version 22h2
- microsoft windows 8.1
- microsoft windows server 2012 r2
- microsoft windows server 2012 r2 (server core installation)
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- microsoft windows server 2016
- microsoft windows server 2016 (server core installation)
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows 10 1507
- microsoft windows 10 1607
- microsoft windows 10 1809
- microsoft windows 10 20h2
- microsoft windows 10 21h2
- microsoft windows 10 22h2
- microsoft windows 11 21h2
- microsoft windows 11 22h2
- microsoft windows rt 8.1
- microsoft windows server 2012
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | hd3s5aa/CVE-2023-21674 | 2024-03-07 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-21674 is a high vulnerability (CVSS 8.8) in Microsoft Windows, published January 10, 2023. CISA lists it as known to be exploited, since January 10, 2023. EUVD reports exploitation since January 10, 2023. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 34.2%, the 98th percentile. No source names a fixed version.