CVE-2025-33073 Details
Description
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
A vulnerability has been identified in Windows Server 2008 R2, Windows Server 2008, Windows Server 2016, Windows 10 (various versions), Windows 11 (versions 22H2 and 23H2), and Windows Server 2022. This vulnerability arises from improper access control in the SMB protocol, which allows an authorized attacker to elevate privileges over a network. Exploitation could enable the attacker to gain SYSTEM privileges on the affected machine.
Users can apply the security updates provided by Microsoft for this vulnerability. These security updates can be downloaded via the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles KB5061078, KB5061036, KB5061026, KB5061010, KB5060999, KB5060533, KB5060526, KB5060531, and KB5060842.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 21, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073 | CISA-ADP | US Government Resource |
| https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products | CVE | Third Party Advisory |
| https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products | CVE | MitigationThird Party Advisory |
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073 | [email protected] | Vendor Advisory |
This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name | Date Added | Due Date | Required Action |
|---|---|---|---|
| Microsoft Windows SMB Client Improper Access Control Vulnerability | Oct 20, 2025 | Nov 10, 2025 | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1507 | < 10.0.10240.21034 |
CPE
Remediation
| |
| microsoft windows 10 1607 | < 10.0.14393.8148 |
CPE
Remediation
| |
| microsoft windows 10 1809 | < 10.0.17763.7434 |
CPE
Remediation
| |
| microsoft windows 10 21h2 | < 10.0.19044.5965 |
CPE
Remediation
| |
| microsoft windows 10 22h2 | < 10.0.19045.5965 |
CPE
Remediation
| |
| microsoft windows 11 22h2 | < 10.0.22621.5472 |
CPE
Remediation
| |
| microsoft windows 11 23h2 | < 10.0.22631.5472 |
CPE
Remediation
| |
| microsoft windows 11 24h2 | < 10.0.26100.4270 |
CPE
Remediation
| |
| microsoft windows server 2008 | r2 sp1 |
CPE
Remediation
| |
| microsoft windows server 2012 | r2 |
CPE
Remediation
| |
| microsoft windows server 2016 | < 10.0.14393.8148 |
CPE
Remediation
| |
| microsoft windows server 2019 | < 10.0.17763.7434 |
CPE
Remediation
| |
| microsoft windows server 2022 | < 10.0.20348.3745 |
CPE
Remediation
| |
| microsoft windows server 2022 23h2 | < 10.0.25398.1665 |
CPE
Remediation
| |
| microsoft windows server 2025 | < 10.0.26100.4270 |
CPE
Remediation
| |
Change History
11 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Oct 27, 2025 | Modified Analysis | [email protected] |
| Oct 21, 2025 | CVE Modified | CISA-ADP |
| Oct 21, 2025 | CVE Modified | CISA-ADP |
| Oct 21, 2025 | CVE Modified | CISA-ADP |
| Oct 21, 2025 | Modified Analysis | [email protected] |
| Oct 21, 2025 | CVE CISA KEV Update | Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government |
| Sep 15, 2025 | CVE Modified | CVE |
| Jul 10, 2025 | Initial Analysis | [email protected] |
| Jun 10, 2025 | New CVE Received | [email protected] |