CVE ID
CVE-2025-33073
Vulnerability Name
Microsoft Windows SMB Client Improper Access Control Vulnerability
- Project: Microsoft
- Product: Windows
Date
- Date Added: 2025-10-20
- Due Date: 2025-11-10
Description
Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate.
Known To Be Used in Ransomware Campaigns?
Unknown
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.
Additional Notes
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-33073 ; https://nvd.nist.gov/vuln/detail/CVE-2025-33073
Related Security News
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- CISA: High-severity Windows SMB flaw now exploited in attacks
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