CVE-2025-33073
Microsoft Windows SMB Client Improper Access Control Vulnerability
CVSS
—
No CVSS
EPSS
82.7%
p100
KEV
YES
Oct 20, 2025
Exploit Today
80
0-100
Published: — · Last modified: —
Product
Microsoft / Windows
Vulnerability
Microsoft Windows SMB Client Improper Access Control Vulnerability
Added to KEV
Oct 20, 2025
Remediate by
Nov 10, 2025
Known ransomware use
No
Summary 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.
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.
Notes
https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-33073 ; https://nvd.nist.gov/vuln/detail/CVE-2025-33073