Is CVE-2025-33073 being actively exploited?

Yes. CVE-2025-33073 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on October 20, 2025.

What is the CVSS score for CVE-2025-33073?

CVE-2025-33073 has a CVSS 3.1 base score of 8.8 (HIGH).

CVE-2025-33073

HIGH · CVSS 8.8CISA KEV: actively exploitedEPSS 82.7%EU EUVD: exploited

Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.

Key facts

CVSS score: 8.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-284
EPSS score: 82.7% (100th percentile)
In CISA KEV: Yes, added October 20, 2025
In EU EUVD: Yes (EUVD-2025-17737)
Published: June 10, 2025
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows SMB Client Improper Access Control Vulnerability

Added to the KEV catalog on October 20, 2025; federal remediation due November 10, 2025.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2025-17737 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on February 26, 2026.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1507
microsoft / windows 10 1507
microsoft / windows 10 1607
microsoft / windows 10 1607
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 21h2
microsoft / windows 10 22h2
microsoft / windows 11 22h2
microsoft / windows 11 23h2
microsoft / windows 11 24h2
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2012
microsoft / windows server 2012
microsoft / windows server 2016
microsoft / windows server 2019
microsoft / windows server 2022
microsoft / windows server 2022 23h2
microsoft / windows server 2025

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Microsoft Windows 10 and Server version 1903 (May 2019 Update) - Microsoft Corporation - Common Criteria 2019-22-INF-2839 - archived

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073(Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073(US Government Resource)
https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products(Third Party Advisory)
https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products(Mitigation, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain