Actively exploited · Published Jan 10, 2023 · Assigned by microsoft
CVE-2023-21674Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
High 8.8 Exploited
In plain English
A high-severity use-after-free in Windows 10 Version 1507 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on January 10, 2023). The chance it is exploited in the next 30 days is estimated at 34.2% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)34.2%top 1.6% of all CVEs
Exploited in the wildYesCISA KEV since Jan 10, 2023
Attack tooling1Public PoC
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Jan 31, 2023.
Official description
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – before 10.0.17763.3887 |
| Microsoft | Windows 10 Version 1809 | 10.0.0 – before 10.0.17763.3887 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.3887 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.3887 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.1487 |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 – before 10.0.19042.2486 |
| Microsoft | Windows 11 version 21H2 | 10.0.0 – before 10.0.22000.1455 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19043.0 – before 10.0.19044.2486 |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 – before 10.0.22621.1105 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.2486 |
| Microsoft | Windows 10 Version 1507 | 10.0.10240.0 – before 10.0.10240.19685 |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – before 10.0.14393.5648 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – before 10.0.14393.5648 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – before 10.0.14393.5648 |
| Microsoft | Windows 8.1 | 6.3.0 – before 6.3.9600.20778 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – before 6.3.9600.20778 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – before 6.3.9600.20778 |
Weakness: CWE-416 · Vector: 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