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Known Exploited Vulnerability
8.8
HIGH CVSS 3.1
CVE-2025-33073
Microsoft Windows SMB Client Improper Access Control Vulnerability - [Actively Exploited]
Description

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

INFO

Published Date :

June 10, 2025, 5:23 p.m.

Last Modified :

Oct. 21, 2025, 11:17 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

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.

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.

Notes :

https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-33073 ; https://nvd.nist.gov/vuln/detail/CVE-2025-33073

Affected Products

The following products are affected by CVE-2025-33073 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft windows_server_2008
2 Microsoft windows_server_2012
3 Microsoft windows_server_2016
4 Microsoft windows_server_2019
5 Microsoft windows_10_1607
6 Microsoft windows_10_1809
7 Microsoft windows_10_21h2
8 Microsoft windows_10_22h2
9 Microsoft windows_server_2022
10 Microsoft windows_11_22h2
11 Microsoft windows_10_1507
12 Microsoft windows_11_23h2
13 Microsoft windows_server_2022_23h2
14 Microsoft windows_server_23h2
15 Microsoft windows_server_2012_r2
16 Microsoft windows_server_2008_r2
17 Microsoft windows_server_2008_sp2
18 Microsoft windows_11_24h2
19 Microsoft windows_server_2025
: Total Affected Vendor : 1 | Products : 19
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
Solution
Apply vendor security updates to address improper access control and privilege escalation.
  • Install the latest Windows security updates.
  • Review and enforce access control policies.
  • Restrict network access to SMB services.
Public PoC/Exploit Available at Github

CVE-2025-33073 has a 23 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-33073.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073 Vendor Advisory
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
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-33073 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-33073 weaknesses.

CAPEC-19: Embedding Scripts within Scripts Embedding Scripts within Scripts CAPEC-441: Malicious Logic Insertion Malicious Logic Insertion CAPEC-478: Modification of Windows Service Configuration Modification of Windows Service Configuration CAPEC-479: Malicious Root Certificate Malicious Root Certificate CAPEC-502: Intent Spoof Intent Spoof CAPEC-503: WebView Exposure WebView Exposure CAPEC-536: Data Injected During Configuration Data Injected During Configuration CAPEC-546: Incomplete Data Deletion in a Multi-Tenant Environment Incomplete Data Deletion in a Multi-Tenant Environment CAPEC-550: Install New Service Install New Service CAPEC-551: Modify Existing Service Modify Existing Service CAPEC-552: Install Rootkit Install Rootkit CAPEC-556: Replace File Extension Handlers Replace File Extension Handlers CAPEC-558: Replace Trusted Executable Replace Trusted Executable CAPEC-562: Modify Shared File Modify Shared File CAPEC-563: Add Malicious File to Shared Webroot Add Malicious File to Shared Webroot CAPEC-564: Run Software at Logon Run Software at Logon CAPEC-578: Disable Security Software Disable Security Software

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
1Nachille/ZIVPO-Lab2-

None

Updated: 4 days ago
0 stars 0 fork 0 watcher
Born at : Oct. 20, 2025, 12:15 p.m. This repo has been linked 10 different CVEs too.
Profile Photo
SellMeFish/windows-smb-vulnerability-framework-cve-2025-33073

Proof-of-Concept

Python PowerShell Batchfile

Updated: 5 days, 12 hours ago
3 stars 1 fork 1 watcher
Born at : Oct. 18, 2025, 1:05 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Andromeda254/cve

list of cve from 2001 to 2024

Python

Updated: 4 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 26, 2025, 12:13 a.m. This repo has been linked 85 different CVEs too.
Profile Photo
cve-2025-33073/cve-2025-33073

None

Updated: 1 month, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Sept. 6, 2025, 8:24 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
lineeralgebra/My-Favorite-Boxes

None

Updated: 2 months, 2 weeks ago
3 stars 0 fork 0 watcher
Born at : Aug. 4, 2025, 7:47 p.m. This repo has been linked 5 different CVEs too.
Profile Photo
Shamhus/Detecting-ADCS-Attacks

None

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Aug. 4, 2025, 1:19 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
yembors64632/cve_monitor_Public

None

Updated: 2 months, 1 week ago
1 stars 0 fork 0 watcher
Born at : July 23, 2025, 11:54 a.m. This repo has been linked 88 different CVEs too.
Profile Photo
OleFredrik1/remoteKrbRelayx

A tool for coercing and relaying Kerberos authentication over DCOM and RPC.

Python

Updated: 3 months ago
91 stars 12 fork 12 watcher
Born at : July 17, 2025, 8:07 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
DakshRocks21/EH_Assignment_Materials

None

Python HTML C++ C PowerShell C# Shell

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : July 1, 2025, 4:29 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
obscura-cert/CVE-2025-33073

None

Python

Updated: 3 months, 2 weeks ago
1 stars 1 fork 1 watcher
Born at : June 28, 2025, 6:17 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Sincan2/windows

Penggabungan script CVE-2025-33073 dan CVE-2024-21338 Logic Automatic Administrator Password

Updated: 4 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : June 15, 2025, 3:58 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
joaozixx/CVE-2025-33073

# CVE-2025-33073PoC Exploit for the NTLM reflection SMB flaw. All credits go to the official research: [Synacktiv](https://www.synacktiv.com/publications/ntlm-reflection-is-dead-long-live-ntlm-reflection-an-in-depth-analysis-of-cve-2025) 🐙### PrerequisitesOS: Kali Linux (has most packages pre-installed).* NetExec (NXC) - https://github.com/P

Python

Updated: 4 months ago
2 stars 0 fork 0 watcher
Born at : June 15, 2025, 7:55 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
mbanyamer/-Windows-11-SMB-Client-RCE-Privilege-Escalation-Exploit-Using-DNS-Poisoning-NTLM-Relay-RPC-Coercion

None

Python

Updated: 3 months, 3 weeks ago
2 stars 1 fork 1 watcher
Born at : June 13, 2025, 5:29 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
mverschu/CVE-2025-33073

PoC Exploit for the NTLM reflection SMB flaw.

Python

Updated: 3 months ago
454 stars 90 fork 90 watcher
Born at : June 13, 2025, 12:15 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
CryptoGenNepal/CVE-KEV-RSS

CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild and CryptoGen Nepal aims to simplify this for the general public in a more understandable way as well as in a format that can be easily integrated into their threat intelligence systems.

cve json rss cgn cisa kev

Python HTML

Updated: 3 days, 21 hours ago
2 stars 1 fork 1 watcher
Born at : Feb. 16, 2025, 5:21 p.m. This repo has been linked 5 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-33073 vulnerability anywhere in the article.

  • The Cyber Express
Microsoft Issues Emergency Patch for Critical WSUS Remote Code Execution Flaw (CVE-2025-59287)

Microsoft has released an urgent out-of-band security update to address a severe remote code execution (RCE) vulnerability in Windows Server Update Services (WSUS). The flaw, tracked as CVE-2025-59287 ... Read more

Published Date: Oct 24, 2025 (2 hours, 13 minutes ago)
  • The Cyber Express
RCE Vulnerability (CVE-2025-62518) Discovered in Popular Rust Library async-tar and Its Forks

A critical flaw has been identified in a Rust library that demands immediate attention from developers and IT decision-makers leveraging the Rust ecosystem. The vulnerability, tracked as CVE‑2025‑6251 ... Read more

Published Date: Oct 23, 2025 (1 day, 2 hours ago)
  • The Cyber Express
Ransomware Attacks Escalate in APAC Targeting VPN Flaws, Microsoft 365 Logins, Python Scripts

The Asia-Pacific (APAC) region is seeing a rapid surge in number of cyberattacks aimed at its enterprises’, a new report suggests. According to Barracuda’s SOC Threat Radar report, threat actors are i ... Read more

Published Date: Oct 22, 2025 (2 days, 7 hours ago)
  • Help Net Security
CISA warns of Windows SMB flaw under active exploitation (CVE-2025-33073)

CVE-2025-33073, a Windows SMB Client vulnerability that Microsoft fixed in June 2025, is being exploited by attackers. The confirmation comes from the Cybersecurity and Infrastructure Security Agency ... Read more

Published Date: Oct 21, 2025 (3 days ago)
  • The Register
Feds flag active exploitation of patched Windows SMB vuln

Uncle Sam's cyber wardens have warned that a high-severity flaw in Microsoft's Windows SMB client is now being actively exploited – months after it was patched. The bug, tracked as CVE-2025-33073, was ... Read more

Published Date: Oct 21, 2025 (3 days, 3 hours ago)
  • The Hacker News
Five New Exploited Bugs Land in CISA's Catalog — Oracle and Microsoft Among Targets

Oct 20, 2025Ravie LakshmananThreat Intelligence / Data Security The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added five security flaws to its Known Exploited Vulnerabil ... Read more

Published Date: Oct 20, 2025 (3 days, 18 hours ago)
  • BleepingComputer
CISA: High-severity Windows SMB flaw now exploited in attacks

CISA says threat actors are now actively exploiting a high-severity Windows SMB privilege escalation vulnerability that can let them gain SYSTEM privileges on unpatched systems. Tracked as CVE-2025-33 ... Read more

Published Date: Oct 20, 2025 (3 days, 20 hours ago)
  • security.nl
Beveiligingslekken in Windows SMB-client en Kentico Xperience actief misbruikt

Kwetsbaarheden in de SMB-client van Windows en Kentico Xperience worden actief misbruikt bij aanvallen, zo waarschuwt het Amerikaanse cyberagentschap CISA. Microsoft kwam op 10 juni met beveiligingsup ... Read more

Published Date: Oct 20, 2025 (3 days, 22 hours ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 04, 2025 (3 months, 2 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 03, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 03, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 03, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 02, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 02, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 02, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 02, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 01, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 01, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 01, 2025 (3 months, 3 weeks ago)
  • CrowdStrike.com
June 2025 Patch Tuesday: One Zero-Day and Nine Critical Vulnerabilities Among 66 CVEs

Microsoft has addressed 66 vulnerabilities in its June 2025 security update release. This month's patches include fixes for one actively exploited zero-day vulnerability and nine Critical vulnerabilit ... Read more

Published Date: Jul 01, 2025 (3 months, 3 weeks ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-33073 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Removed Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073
  • Modified Analysis by [email protected]

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference Type CVE: https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products Types: Third Party Advisory
    Added Reference Type CVE: https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products Types: Mitigation, Third Party Advisory
  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Date Added 2025-10-20
    Added Due Date 2025-11-10
    Added 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.
    Added Vulnerability Name Microsoft Windows SMB Client Improper Access Control Vulnerability
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Sep. 15, 2025

    Action Type Old Value New Value
    Added Reference https://www.vicarius.io/vsociety/posts/cve-2025-33073-detection-script-improper-access-control-in-windows-smb-affects-microsoft-products
    Added Reference https://www.vicarius.io/vsociety/posts/cve-2025-33073-mitigation-script-improper-access-control-in-windows-smb-affects-microsoft-products
  • Initial Analysis by [email protected]

    Jul. 10, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.10240.21034 *cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.10240.21034 *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.14393.8148 *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.14393.8148 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.17763.7434 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.17763.7434 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19044.5965 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19045.5965 *cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22621.5472 *cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22631.5472 *cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.26100.4270 *cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.14393.8148 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.7434 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.3745 *cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.25398.1665 *cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.26100.4270
    Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073 Types: Vendor Advisory
  • New CVE Received by [email protected]

    Jun. 10, 2025

    Action Type Old Value New Value
    Added Description Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-284
    Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-33073
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact