Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 80.4%; technical severity is CVSS 8.8.
Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
Who should care
- Teams operating Windows, Windows 10 1507, Windows 10 1607 +13 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Windows, Windows 10 1507, Windows 10 1607 +13 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Microsoft Security advisory CVE-2025-33073
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-284
- Affected versions
- Microsoft Windows; Microsoft Windows 10 1507 (End Excluding 10.0.10240.21034 | End Excluding 10.0.10240.21034); Microsoft Windows 10 1607 (End Excluding 10.0.14393.8148 | End Excluding 10.0.14393.8148); Microsoft Windows 10 1809 (End Excluding 10.0.17763.7434 | End Excluding 10.0.17763.7434); Microsoft Windows 10 21h2 (End Excluding 10.0.19044.5965); Microsoft Windows 10 22h2 (End Excluding 10.0.19045.5965); Microsoft Windows 11 22h2 (End Excluding 10.0.22621.5472); Microsoft Windows 11 23h2 (End Excluding 10.0.22631.5472)
- Fixed versions
- Microsoft Windows 10 1507 (Fixed from 10.0.10240.21034); Microsoft Windows 10 1607 (Fixed from 10.0.14393.8148); Microsoft Windows 10 1809 (Fixed from 10.0.17763.7434); Microsoft Windows 10 21h2 (Fixed from 10.0.19044.5965); Microsoft Windows 10 22h2 (Fixed from 10.0.19045.5965); Microsoft Windows 11 22h2 (Fixed from 10.0.22621.5472); Microsoft Windows 11 23h2 (Fixed from 10.0.22631.5472); Microsoft Windows 11 24h2 (Fixed from 10.0.26100.4270)
- Published
- 10 June 2025
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 80.4%
- Signal calculated at 82