Microsoft Windows SMB Client Improper Access Control Vulnerability

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

• cpe microsoft/windows 10 1507version unspecified
• cpe microsoft/windows 10 1607version unspecified
• cpe microsoft/windows 10 1809version unspecified
• cpe microsoft/windows 10 21h2version unspecified
• cpe microsoft/windows 10 22h2version unspecified
• vendor Microsoft Windowsversion unspecified
• vendor Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 <10.0.25398.166510.0.25398.0 <10.0.25398.1665

How to fix CVE-2025-33073

• Recommended remediation

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA due date Nov 10, 2025.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • EUVD · euvd.enisa.europa.eu
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Technology hubs

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Jun 10, 2025 · Catalog

   Detected

   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.

2. Oct 20, 2025 · CISA KEV

   Known exploited

   Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

3. Nov 10, 2025 · CISA KEV

   Remediation due

   Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

4. Jun 17, 2026 · Catalog

   Updated

   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.

Sources

• CISA KEVConfirmed exploitationCVE-2025-33073

  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.

  cisa.gov
• CVE.orgVulnerability recordCVE-2025-33073

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2025-33073

  30-day exploitation probability 82.7%

  first.org
• EUVDVulnerability recordEUVD-2025-17737

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

  euvd.enisa.europa.eu
• Exploit DatabasePublic exploit reference52330

  Public archive entry. The exploit body is not stored here.

  exploit-db.com
• NIST NVDVulnerability recordCVE-2025-33073

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

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2025-33073

  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.

  vulncheck.com

References

• EUVD record · euvd.enisa.europa.eu
• CISA note · msrc.microsoft.com
• Vendor Advisory · msrc.microsoft.com
• CISA note · nvd.nist.gov
• VulnCheck exploitation evidence · ransom-isac.org
• VulnCheck exploitation evidence · research.checkpoint.com
• VulnCheck exploitation evidence · securelist.com
• US Government Resource · cisa.gov
• VulnCheck exploitation evidence · cisa.gov
• VulnCheck exploitation evidence · enisa.europa.eu
• VulnCheck exploitation evidence · loginsoft.com
• Third Party Advisory · vicarius.io
• Mitigation · vicarius.io

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.