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6.5
MEDIUM CVSS 3.1
CVE-2021-26414
Windows DCOM Server Security Feature Bypass
Description

Windows DCOM Server Security Feature Bypass

INFO

Published Date :

June 8, 2021, 11:15 p.m.

Last Modified :

Nov. 21, 2024, 5:56 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-26414 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_10
2 Microsoft windows_7
3 Microsoft windows_8.1
4 Microsoft windows_rt_8.1
5 Microsoft windows_server_2008
6 Microsoft windows_server_2012
7 Microsoft windows_server_2016
8 Microsoft windows_server_2019
9 Microsoft windows_server
10 Microsoft windows_10_1607
11 Microsoft windows_10_1809
12 Microsoft windows_10_20h2
13 Microsoft windows_10_21h2
14 Microsoft windows_server_2022
15 Microsoft windows_11_21h2
16 Microsoft windows_10_1507
17 Microsoft windows_10_21h1
18 Microsoft windows_10_1909
19 Microsoft windows_server_2012_r2
20 Microsoft windows_server_2008_r2
21 Microsoft windows_server_2008_sp2
: Total Affected Vendor : 1 | Products : 21
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 2.0 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
This vulnerability can be mitigated by applying the latest security updates and enabling DCOM hardening.
  • Apply the latest security updates.
  • Enable DCOM hardening by setting the registry value RequireIntegrityActivationAuthenticationLevel to 1 under HKEY_LOCAL_MACHINE\Software\Microsoft\Ole\AppCompat.
Public PoC/Exploit Available at Github

CVE-2021-26414 has a 8 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-2021-26414.

URL Resource
http://packetstormsecurity.com/files/163206/Windows-Kerberos-AppContainer-Enterprise-Authentication-Capability-Bypass.html Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26414 Patch Vendor Advisory
http://packetstormsecurity.com/files/163206/Windows-Kerberos-AppContainer-Enterprise-Authentication-Capability-Bypass.html Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26414 Patch 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-2021-26414 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-2021-26414 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
Cybug-404/Task_3

None

Updated: 4 months ago
0 stars 0 fork 0 watcher
Born at : June 26, 2025, 3:15 p.m. This repo has been linked 3 different CVEs too.
Profile Photo
whoforget/CVE-POC

None

Updated: 2 years, 7 months ago
0 stars 2 fork 2 watcher
Born at : April 8, 2023, 6:19 a.m. This repo has been linked 928 different CVEs too.
Profile Photo
k0mi-tg/CVE-POC

None

Updated: 1 year, 8 months ago
20 stars 3 fork 3 watcher
Born at : Feb. 14, 2023, 6:10 p.m. This repo has been linked 921 different CVEs too.
Profile Photo
otoriocyber/DCOM-HardeningTool

Powershell script for Windows to retrieve the authentication hardening status of DCOM applications

PowerShell

Updated: 8 months, 2 weeks ago
21 stars 2 fork 2 watcher
Born at : Jan. 15, 2023, 2:26 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Nels2/dcom_10036_Solver

This script was created to automate addressing the vulnerability described in CVE-2021-26414 (https://support.microsoft.com/en-us/topic/kb5004442-manage-changes-for-windows-dcom-server-security-feature-bypass-cve-2021-26414-f1400b52-c141-43d2-941e-37ed901c769c), adds two regkeys under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\AppCompa

PowerShell Batchfile

Updated: 3 years ago
0 stars 0 fork 0 watcher
Born at : Oct. 25, 2022, 3:24 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
FDlucifer/Proxy-Attackchain

Proxylogon & Proxyshell & Proxyoracle & Proxytoken & All exchange server history vulns summarization :)

attackchains exploit vulnerability exchange-server golang python-script proxylogon proxyshell proxyoracle proxytoken proxyrelay cve-2021-42321 proxymaybeshell proxynotshell

Go Python C C# Batchfile Ruby ASP.NET HTML PowerShell JavaScript

Updated: 3 months, 2 weeks ago
542 stars 113 fork 113 watcher
Born at : Nov. 27, 2021, 1:32 p.m. This repo has been linked 37 different CVEs too.
Profile Photo
n0-traces/cve_monitor

Automatic monitor github cve using Github Actions

Python

Updated: 8 months ago
2 stars 55 fork 55 watcher
Born at : April 7, 2021, 11:16 a.m. This repo has been linked 1008 different CVEs too.
Profile Photo
op7ic/DCOM-Audit

DCOM-Audit: Enumerate, Audit, and Secure DCOM objects

dcom security-tools blueteam blueteam-tools incident-response redteam redteam-tools

PowerShell

Updated: 4 months ago
2 stars 3 fork 3 watcher
Born at : Dec. 17, 2018, 11:40 a.m. This repo has been linked 1 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-2021-26414 vulnerability anywhere in the article.

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-2021-26414 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/163206/Windows-Kerberos-AppContainer-Enterprise-Authentication-Capability-Bypass.html
    Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26414
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Aug. 01, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 Microsoft Corporation AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
  • Modified Analysis by [email protected]

    Sep. 12, 2022

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/163206/Windows-Kerberos-AppContainer-Enterprise-Authentication-Capability-Bypass.html No Types Assigned http://packetstormsecurity.com/files/163206/Windows-Kerberos-AppContainer-Enterprise-Authentication-Capability-Bypass.html Third Party Advisory, VDB Entry
    Changed CPE Configuration OR *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* OR *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* *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_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x86:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jun. 17, 2021

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/163206/Windows-Kerberos-AppContainer-Enterprise-Authentication-Capability-Bypass.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Jun. 10, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
    Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26414 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26414 Patch, Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
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: 6.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 4.3
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

23.32 }} 8.30%

score

0.95710

percentile