CISA KEV · Known exploitedHigh

CVE-2025-33073

Microsoft Windows

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

CVSS: 8.8
EPSS: 78.5%
CISA KEV: Listed
Published: 2025.06.11

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability78.5%

Technical severityCVSS 8.8

Vulnerability overview

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

Affected product and versions

Product: Microsoft Windows
Affected versions: 10.0.10240.0, 10.0.14393.0, 10.0.17763.0, 10.0.19044.0, 10.0.19045.0, 10.0.22621.0, 10.0.22631.0, 10.0.26100.0, 6.1.7601.0, 6.0.6003.0, 6.2.9200.0, 6.3.9600.0, 10.0.20348.0, 10.0.25398.0, < 10.0.10240.21034, < 10.0.14393.8148, < 10.0.17763.7434, < 10.0.19044.5965, < 10.0.19045.5965, < 10.0.22621.5472
Fixed versions: 10.0.10240.21034, 10.0.14393.8148, 10.0.17763.7434, 10.0.19044.5965, 10.0.19045.5965, 10.0.22621.5472, 10.0.22631.5472, 10.0.26100.4270, 10.0.20348.3745, 10.0.25398.1665

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA 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.

Due date: 2025.11.10

1
Identify
Confirm that Microsoft Windows and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-284
KEV added: 2025.10.20
Ransomware use: 미확인