Exploited vulnerability

CVE-2025-33073

TLP:CLEAR

Microsoft Windows SMB Client Improper Access Control Vulnerability

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.

Facts

Vendor: Microsoft
Product: Windows
CVSS: 8.8
EPSS (probability of exploitation within 30 days): 82.7 %
On CISA's Known Exploited Vulnerabilities list since: 20 October 2025
First known exploitation: 20 October 2025
CISA's deadline for US federal agencies: 10 November 2025
Weakness: CWE-284
First seen by Risk Letters: 20 October 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD