CVE-2025-33073

Microsoft Windows 10 Version 1507, Microsoft Windows 10 Version 1607, Microsoft Windows 10 Version 1809

Published 10 Jun 2025 · updated 17 Jun 2026 · Analyzed

8.8 High · CVSS 3.1, microsoft.com

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 20 Oct 2025, with a remediation deadline of 10 Nov 2025 for US federal agencies.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Description

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

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073 · Vendor Advisory
www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products · Third Party Advisory
www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products · Mitigation, Third Party Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073 · US Government Resource