HIGH KEV
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Published Jan 10, 2023 ·Due Jan 31, 2023
8.8
HIGHCVSS 3.1
EPSS 40.99%
Description
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Affected products
-
- Version 10.0.10240.0StatusaffectedConstraints<10.0.10240.19685
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.5648
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.17763.3887
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.3887
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.19042.2486
- Version
-
- Version 10.0.19043.0StatusaffectedConstraints<10.0.19044.2486
- Version
-
- Version 10.0.19045.0StatusaffectedConstraints<10.0.19045.2486
- Version
-
- Version 10.0.0StatusaffectedConstraints<10.0.22000.1455
- Version
-
- Version 10.0.22621.0StatusaffectedConstraints<10.0.22621.1105
- Version
-
- Version 6.3.0StatusaffectedConstraints<6.3.9600.20778
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.20778
- Version
-
- Version 6.3.9600.0StatusaffectedConstraints<6.3.9600.20778
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.5648
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.5648
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.3887
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.3887
- Version
-
- Version 10.0.20348.0StatusaffectedConstraints<10.0.20348.1487
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 1507 | n/a |
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| Microsoft | Windows 10 Version 1607 | n/a |
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| Microsoft | Windows 10 Version 1809 | n/a |
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| Microsoft | Windows 10 Version 20H2 | n/a |
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| Microsoft | Windows 10 Version 21H2 | n/a |
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| Microsoft | Windows 10 Version 22H2 | n/a |
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| Microsoft | Windows 11 version 21H2 | n/a |
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| Microsoft | Windows 11 version 22H2 | n/a |
| |||||||||
| Microsoft | Windows 8.1 | n/a |
| |||||||||
| Microsoft | Windows Server 2012 R2 | n/a |
| |||||||||
| Microsoft | Windows Server 2012 R2 (Server Core installation) | n/a |
| |||||||||
| Microsoft | Windows Server 2016 | n/a |
| |||||||||
| Microsoft | Windows Server 2016 (Server Core installation) | n/a |
| |||||||||
| Microsoft | Windows Server 2019 | n/a |
| |||||||||
| Microsoft | Windows Server 2019 (Server Core installation) | n/a |
| |||||||||
| Microsoft | Windows Server 2022 | n/a |
|
OR
- < 10.0.10240.19685
- < 10.0.14393.5648
- < 10.0.17763.3887
- < 10.0.19042.2486
- < 10.0.19044.2486
- < 10.0.19045.2486
- < 10.0.22000.1455
- < 10.0.22621.1105
- n/a
- r2
- < 10.0.14393.5648
- < 10.0.17763.3887
- < 10.0.20348.1487
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
8.8 HIGH CVE.org
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
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
Exploit Maturity Functional
1 other source (NVD) ▾
8.8 HIGH NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Listed in CISA KEV KEV
Date Added
Jan 10, 2023
Patch Due
Jan 31, 2023
Required Action
Apply updates per vendor instructions.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jul 24, 2024 · SSVC 2.0.3
40.99% 0.40987
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.40987
Score over time
2023–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (37 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 40.99% (0.40987) | 98.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 41.54% (0.41538) | 98.50th | v5 (v2026.06.15) |
| Jun 8, 2026 | 20.12% (0.20122) | 95.62th | v4 (v2025.03.14) |
| May 27, 2026 | 16.62% (0.16620) | 95.01th | v4 (v2025.03.14) |
| Apr 26, 2026 | 11.58% (0.11576) | 93.67th | v4 (v2025.03.14) |
| Apr 7, 2026 | 10.14% (0.10144) | 93.08th | v4 (v2025.03.14) |
| Mar 22, 2026 | 15.99% (0.15990) | 94.69th | v4 (v2025.03.14) |
| Nov 21, 2025 | 12.85% (0.12848) | 93.75th | v4 (v2025.03.14) |
| Nov 18, 2025 | 42.85% (0.42848) | 97.33th | v4 (v2025.03.14) |
| Oct 31, 2025 | 12.85% (0.12848) | 93.72th | v4 (v2025.03.14) |
| Sep 1, 2025 | 9.98% (0.09979) | 92.80th | v4 (v2025.03.14) |
| Jul 26, 2025 | 8.96% (0.08963) | 92.21th | v4 (v2025.03.14) |
| May 10, 2025 | 9.98% (0.09979) | 92.61th | v4 (v2025.03.14) |
| Mar 30, 2025 | 8.96% (0.08963) | 91.81th | v4 (v2025.03.14) |
| Mar 29, 2025 | 18.14% (0.18139) | 92.06th | v4 (v2025.03.14) |
| Mar 28, 2025 | 8.96% (0.08963) | 91.81th | v4 (v2025.03.14) |
| Mar 27, 2025 | 18.14% (0.18139) | 94.33th | v4 (v2025.03.14) |
| Mar 25, 2025 | 11.22% (0.11223) | 92.81th | v4 (v2025.03.14) |
| Mar 20, 2025 | 10.13% (0.10133) | 92.47th | v4 (v2025.03.14) |
| Mar 19, 2025 | 16.90% (0.16897) | 94.19th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.09% (0.06094) | 90.08th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00097) | 42.26th | v3 (v2023.03.01) |
| Jul 5, 2024 | 0.40% (0.00404) | 73.83th | v3 (v2023.03.01) |
| Jun 29, 2024 | 0.38% (0.00384) | 73.23th | v3 (v2023.03.01) |
| May 26, 2024 | 0.56% (0.00559) | 77.59th | v3 (v2023.03.01) |
| Apr 29, 2024 | 0.73% (0.00727) | 80.48th | v3 (v2023.03.01) |
| Apr 16, 2024 | 0.68% (0.00683) | 79.75th | v3 (v2023.03.01) |
| Mar 8, 2024 | 0.65% (0.00651) | 78.89th | v3 (v2023.03.01) |
| May 8, 2023 | 0.10% (0.00096) | 38.92th | v3 (v2023.03.01) |
| Apr 19, 2023 | 2.53% (0.02526) | 88.56th | v3 (v2023.03.01) |
| Apr 14, 2023 | 2.82% (0.02822) | 89.11th | v3 (v2023.03.01) |
| Mar 25, 2023 | 1.15% (0.01152) | 82.66th | v3 (v2023.03.01) |
| Mar 17, 2023 | 1.02% (0.01022) | 81.51th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.12% (0.01120) | 82.36th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.15% (0.01150) | 60.47th | v2 (v2022.01.01) |
| Jan 18, 2023 | 1.15% (0.01150) | 59.80th | v2 (v2022.01.01) |
| Jan 11, 2023 | 0.89% (0.00885) | 27.27th | v2 (v2022.01.01) |
Weaknesses (1)
References (2)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21674 vendor-advisoryPatchVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21674 government-resourceUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21674 | vendor-advisoryPatchVendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21674 | government-resourceUS Government Resource |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Jan 10, 2023
Updated Oct 21, 2025
Reserved Dec 13, 2022
Link CVE-2023-21674
CISA Vulnrichment
Updated Jul 24, 2024