1. Home
  2. Vulnerabilities
  3. CVE-2025-26673
7.5
HIGH CVSS 3.1
CVE-2025-26673
Microsoft Windows LDAP Uncontrolled Resource Consumption Denial of Service Vulnerability
Description

Uncontrolled resource consumption in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.

INFO

Published Date :

April 8, 2025, 6:15 p.m.

Last Modified :

July 9, 2025, 4:36 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-26673 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
13 Microsoft windows_11_23h2
14 Microsoft windows_server_2022_23h2
15 Microsoft windows_server_23h2
16 Microsoft windows_server_2012_r2
17 Microsoft windows_server_2008_r2
18 Microsoft windows_server_2008_sp2
19 Microsoft windows_11_24h2
20 Microsoft windows_server_2025
: Total Affected Vendor : 1 | Products : 20
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
This vulnerability allows a denial of service. To remediate, apply the latest security updates provided by the vendor.
  • Apply the appropriate security updates.
  • Restart the system if required by the update.
Public PoC/Exploit Available at Github

CVE-2025-26673 has a 1 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-2025-26673.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26673 Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-26673 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-2025-26673 weaknesses.

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
SafeBreach-Labs/Win-DoS

A set of tools and exploits to cause DoS for remote Windows Server & Windows 11 machines

Python

Updated: 1 week, 2 days ago
27 stars 3 fork 3 watcher
Born at : June 25, 2025, 8:02 a.m. This repo has been linked 4 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-2025-26673 vulnerability anywhere in the article.

  • Daily CyberSecurity
The Win-DDoS Epidemic: New Flaws Weaponize Windows Domain Controllers for Massive DoS Attacks, PoC Releases

SafeBreach Labs researchers have uncovered a new class of denial-of-service (DoS) vulnerabilities in Microsoft Windows that could enable attackers to weaponize critical infrastructure — without ever b ... Read more

Published Date: Aug 12, 2025 (1 week, 5 days ago)
  • Help Net Security
Win-DDoS: Attackers can turn public domain controllers into DDoS agents

SafeBreach researchers have released details on several vulnerabilities that could be exploited by attackers to crash Windows Active Directory domain controllers (DCs), one one of which (CVE-2025-3272 ... Read more

Published Date: Aug 11, 2025 (1 week, 6 days ago)
  • CybersecurityNews
New ‘Win-DoS’ Zero-Click Vulnerabilities Turns Windows Server/Endpoint, Domain Controllers Into DDoS Botnet

LAS VEGAS — At the DEF CON 33 security conference, researchers Yair and Shahak Morag of SafeBreach Labs unveiled a new class of denial-of-service (DoS) attacks, dubbed the “Win-DoS Epidemic.” The duo ... Read more

Published Date: Aug 10, 2025 (2 weeks ago)
  • The Hacker News
New Win-DDoS Flaws Let Attackers Turn Public Domain Controllers into DDoS Botnet via RPC, LDAP

Aug 10, 2025Ravie LakshmananVulnerability / Network Security A novel attack technique could be weaponized to rope thousands of public domain controllers (DCs) around the world to create a malicious ... Read more

Published Date: Aug 10, 2025 (2 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-2025-26673 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.

  • Initial Analysis by [email protected]

    Jul. 09, 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_server_2022_23h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.25398.1551 *cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.10240.20978 *cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.10240.20978 *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.14393.7969 *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.14393.7969 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.17763.7136 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.17763.7136 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19044.5737 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19045.5737 *cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22621.5189 *cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.14393.7969 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.7136 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.3453 *cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.22631.5189 *cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.26100.3775 *cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.26100.3775
    Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26673 Types: Vendor Advisory
  • New CVE Received by [email protected]

    Apr. 08, 2025

    Action Type Old Value New Value
    Added Description Uncontrolled resource consumption in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-400
    Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26673
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: 7.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact