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CVE-2025-33073: Microsoft Windows SMB Client Improper Access Control Vulnerability
Microsoft Windows · in CISA KEV since 2025-10-20
2025-10-20added to KEV
2025-11-10federal remediation due date
82.70%EPSS exploit probability (30 days) 99.7th percentile
8.8 HIGHCVSS 3.1
Unknownknown ransomware use
132days from NVD publication to KEV
What it is
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 (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-284 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2025-06-10 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-33073.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.