HIGHCVSS 8.8Actively exploited · CISA KEV since 2025-10-20Vulnerability

CVE-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.

Properties

Euvd product
Windows Server 2022, 23H2 Edition (Server Core installation), Windows 10 Version 21H2, Windows Server 2019, Windows Server 2008 Service Pack 2, Windows Server 2025, Windows Server 2022, Windows Server 2012, Windows Server 2019 (Server Core installation), Windows 11 version 22H2, Windows 10 Version 1607, Windows Server 2008 Service Pack 2 (Server Core installation), Windows 11 Version 24H2, Windows 11 version 22H3, Windows Server 2012 R2, Windows Server 2016, Windows 10 Version 1809, Windows Server 2008 R2 Service Pack 1, Windows Server 2016 (Server Core installation), Windows Server 2012 R2 (Server Core installation), Windows Server 2012 (Server Core installation), Windows 10 Version 1507, Windows Server 2025 (Server Core installation), Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows 10 Version 22H2, Windows 11 Version 23H2
Vulnerability name
Microsoft Windows SMB Client Improper Access Control Vulnerability
First seen
2026-02-26T17:50:53+00:00
Cvss score
8.8
Epss score
0.82699
Last seen
2026-10-19T12:00:27+00:00
Due date
2025-11-10
Euvd assigner
microsoft
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2025-10-20T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2025-10-20
Score
8.8
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Microsoft
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.8

Related Entities (26 · showing 25)

AFFECTS_PRODUCT (21 · showing 20)

→[Product]cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:*
→[Product]cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
→[Product]cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
→[Product]cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*

MENTIONED_IN (2)

→[Campaign]From edge appliance to enterprise compromise: Multi-stage Linux intrusion via F5 and Confluence
→[Campaign]Thus Spoke…The Gentlemen

DESCRIBES (1)

←[KEVEntry]Microsoft Windows SMB Client Improper Access Control Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Access Control

INVOLVES (1)

←[Signal]kev_added · 2025-10-20

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CVE-2025-33073 (CVSS 8.8) — Ninja Signal Threat Intelligence | Ninja Signal