# CVE-2025-33073

Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

- Page: https://www.vulneraibility.com/cve/CVE-2025-33073
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2025-10-20; CISA due date 2025-11-10
- EPSS: 82.70%
- Public exploit code: 1 on Exploit-DB · 11 GitHub proofs of concept (first 2025-06-13)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-10-21)
- Weakness: CWE-284
- Published: 2025-06-10

## Affected versions

- Microsoft Windows 10 Version 1507: affected >= 10.0.10240.0 and < 10.0.10240.21034
- Microsoft Windows 10 Version 1607: affected >= 10.0.14393.0 and < 10.0.14393.8148
- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.7434
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19044.0 and < 10.0.19044.5965
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.5965
- Microsoft Windows 11 version 22H2: affected >= 10.0.22621.0 and < 10.0.22621.5472
- Microsoft Windows 11 version 22H3: affected >= 10.0.22631.0 and < 10.0.22631.5472
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.5472
- Microsoft Windows 11 Version 24H2: affected >= 10.0.26100.0 and < 10.0.26100.4349
- Microsoft Windows Server 2008 R2 Service Pack 1: affected >= 6.1.7601.0 and < 6.1.7601.27769
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation): affected >= 6.1.7601.0 and < 6.1.7601.27769
- Microsoft Windows Server 2008 Service Pack 2: affected >= 6.0.6003.0 and < 6.0.6003.23351
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation): affected >= 6.0.6003.0 and < 6.0.6003.23351
- Microsoft Windows Server 2012: affected >= 6.2.9200.0 and < 6.2.9200.25522
- Microsoft Windows Server 2012 R2: affected >= 6.3.9600.0 and < 6.3.9600.22620
- Microsoft Windows Server 2012 R2 (Server Core installation): affected >= 6.3.9600.0 and < 6.3.9600.22620
- Microsoft Windows Server 2012 (Server Core installation): affected >= 6.2.9200.0 and < 6.2.9200.25522
- Microsoft Windows Server 2016: affected >= 10.0.14393.0 and < 10.0.14393.8148
- Microsoft Windows Server 2016 (Server Core installation): affected >= 10.0.14393.0 and < 10.0.14393.8148
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.7434
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.7434
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.3807
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): affected >= 10.0.25398.0 and < 10.0.25398.1665
- Microsoft Windows Server 2025: affected >= 10.0.26100.0 and < 10.0.26100.4349
- Microsoft Windows Server 2025 (Server Core installation): affected >= 10.0.26100.0 and < 10.0.26100.4349

A version outside these ranges is not a statement that it is unaffected.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.