Vulnerability · Published Mar 10, 2026 · Assigned by microsoft
CVE-2026-24294Windows SMB Server Elevation of Privilege Vulnerability
High 7.8
In plain English
A high-severity improper authentication in Windows 10 Version 1607 from Microsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 5.2% (higher than 92% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)5.2%top 7.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC
Official description
Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – before 10.0.14393.8957 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – before 10.0.17763.8511 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – before 10.0.19044.7058 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.7058 |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 – before 10.0.22631.6783 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.6783 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.8037 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.8037 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – before 10.0.28000.1719 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – before 6.2.9200.25973 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – before 6.2.9200.25973 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – before 6.3.9600.23074 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – before 6.3.9600.23074 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – before 10.0.14393.8957 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – before 10.0.14393.8957 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.8511 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.8511 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.4893 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.2207 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.32522 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.32522 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows SMB Server Elevation of Privilege Vulnerability vendor-advisory, patch
- https://github.com/0xNDI/CVE-2026-24294 exploit
- https://www.vicarius.io/vsociety/posts/cve-2026-24294-detection-script-improper-authentication-vulnerability-in-windows-smb-server
- https://www.vicarius.io/vsociety/posts/cve-2026-24294-mitigation-script-improper-authentication-vulnerability-in-windows-smb-server