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8.8
HIGH CVSS 3.1
CVE-2021-38666
Remote Desktop Client Remote Code Execution Vulnerability
Description

Remote Desktop Client Remote Code Execution Vulnerability

INFO

Published Date :

Nov. 10, 2021, 1:18 a.m.

Last Modified :

Nov. 21, 2024, 6:17 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-38666 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_10_1607
10 Microsoft windows_10_1809
11 Microsoft windows_10_20h2
12 Microsoft windows_server_2022
13 Microsoft windows_11_21h2
14 Microsoft windows_11
15 Microsoft windows_10_1507
16 Microsoft windows_10_21h1
17 Microsoft windows_10_1909
18 Microsoft windows_server_20h2
19 Microsoft windows_server_2004
20 Microsoft windows_server_2012_r2
21 Microsoft windows_server_2008_r2
22 Microsoft windows_server_2008_sp2
: Total Affected Vendor : 1 | Products : 22
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 HIGH [email protected]
CVSS 3.1 HIGH [email protected]
Solution
Microsoft Windows is affected by a remote code execution vulnerability; updating the affected systems is recommended.
  • Apply the latest security updates released by Microsoft.
  • Reboot the system if prompted.
Public PoC/Exploit Available at Github

CVE-2021-38666 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-2021-38666.

URL Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38666 Patch Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38666 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-2021-38666 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-2021-38666 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
yrime/WinAflCustomMutate

its fork winafl

CMake C PLpgSQL C++ JavaScript Rich Text Format Python

Updated: 2 years, 8 months ago
1 stars 0 fork 0 watcher
Born at : Feb. 28, 2023, 9:43 a.m. This repo has been linked 165 different CVEs too.
Profile Photo
Team-BT5/WinAFL-RDP

WinAFL modified for RDP client fuzzing

CMake C PLpgSQL C++ JavaScript Rich Text Format Python

Updated: 8 months, 1 week ago
19 stars 6 fork 6 watcher
Born at : Dec. 18, 2022, 1:13 p.m. This repo has been linked 163 different CVEs too.
Profile Photo
ssumachai/CS182-Project

None

CMake C HTML JavaScript CSS C++ Perl PLpgSQL Rich Text Format Python

Updated: 2 years, 10 months ago
1 stars 0 fork 0 watcher
Born at : Nov. 23, 2022, 10:57 p.m. This repo has been linked 165 different CVEs too.
Profile Photo
bacon-tomato-spaghetti/WinAFL-RDP

None

CMake C PLpgSQL C++ JavaScript Rich Text Format Python

Updated: 7 months ago
0 stars 0 fork 0 watcher
Born at : Nov. 10, 2022, 5:15 a.m. This repo has been linked 163 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 7 months ago
9 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 944 different CVEs too.
Profile Photo
ImuSpirit/CVE-2021-38666

RDP Client RCE

Updated: 3 years, 10 months ago
0 stars 0 fork 0 watcher
Born at : Dec. 11, 2021, 9:42 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
DarkSprings/CVE-2021-38666-poc

None

Updated: 1 year, 6 months ago
2 stars 1 fork 1 watcher
Born at : Nov. 12, 2021, 2:21 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
googleprojectzero/winafl

A fork of AFL for fuzzing Windows binaries

fuzzing security afl

CMake C PLpgSQL C++ JavaScript Python Rich Text Format

Updated: 2 months, 1 week ago
2462 stars 505 fork 505 watcher
Born at : July 7, 2016, 11:46 a.m. This repo has been linked 171 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-2021-38666 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-2021-38666 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 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38666
  • CVE Modified by [email protected]

    May. 14, 2024

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

    Dec. 28, 2023

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

    Nov. 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:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38666 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38666 Patch, Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:arm64:* *cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* *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:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*
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
Base CVSS Score: 6.8
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.

24.35 }} 5.40%

score

0.95841

percentile