7.8
HIGH CVSS 3.1
CVE-2021-31969
Windows Cloud Files Mini Filter Driver Elevation of Privilege
Description

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

INFO

Published Date :

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

Last Modified :

Nov. 21, 2024, 6:06 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-31969 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_server_2016
3 Microsoft windows_server_2019
4 Microsoft windows_10_1809
5 Microsoft windows_10_20h2
6 Microsoft windows_10_21h1
7 Microsoft windows_10_1909
8 Microsoft windows_server_20h2
9 Microsoft windows_server_2004
: Total Affected Vendor : 1 | Products : 9
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
Follow the instructions below to mitigate the CVE-2021-31969 vulnerability.
Apply Cumulative Update 5003646
Public PoC/Exploit Available at Github

CVE-2021-31969 has a 5 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-2021-31969.

URL Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31969 Patch Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-797/ Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31969 Patch Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-797/ Third Party Advisory VDB Entry
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-31969 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-2021-31969 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
Jalexander798/JA_Tools-Cybersecurity-Resource-2

None

Updated: 3 weeks, 1 day ago
0 stars 0 fork 0 watcher
Born at : July 25, 2025, 7:02 p.m. This repo has been linked 96 different CVEs too.
Profile Photo
bachkhoasoft/awesome-list-ks

None

Updated: 1 month, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : June 29, 2025, 6:30 a.m. This repo has been linked 94 different CVEs too.
Profile Photo
MochiNishimiya/Project-Sekai-2024

None

C++ C

Updated: 1 month, 3 weeks ago
3 stars 0 fork 0 watcher
Born at : Aug. 31, 2024, 12:23 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
zerozenxlabs/CVE-2023-36424

Windows Kernel Pool (clfs.sys) Corruption Privilege Escalation

C++

Updated: 4 weeks ago
128 stars 21 fork 21 watcher
Born at : March 21, 2024, 9:39 p.m. This repo has been linked 2 different CVEs too.
Profile Photo
0xor0ne/awesome-list

Cybersecurity oriented awesome list

awesome awesome-list cybersecurity exploitation reverse-engineering

Updated: 1 day, 1 hour ago
2230 stars 218 fork 218 watcher
Born at : May 6, 2022, 6:02 p.m. This repo has been linked 98 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-2021-31969 vulnerability anywhere in the article.

  • Cybersecurity News
Raspberry Robin’s Stealth Tactics: USB Infections, Exploits, and Advanced Obfuscation Unveiled

Raspberry Robin, also known as Roshtyak, stands out as a highly advanced malicious downloader. Discovered in 2021, it has gained notoriety for its use of infected USB drives and sophisticated techniqu ... Read more

Published Date: Nov 22, 2024 (8 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-2021-31969 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-2021-31969
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-797/
  • 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Modified Analysis by [email protected]

    Sep. 14, 2021

    Action Type Old Value New Value
    Changed Reference Type https://www.zerodayinitiative.com/advisories/ZDI-21-797/ No Types Assigned https://www.zerodayinitiative.com/advisories/ZDI-21-797/ Third Party Advisory, VDB Entry
  • CVE Modified by [email protected]

    Jul. 15, 2021

    Action Type Old Value New Value
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-21-797/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jun. 11, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31969 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31969 Patch, Vendor Advisory
    Added CWE NIST CWE-269
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* *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:-:*:*:*:*:*:*:*
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: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 4.6
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.

2.23 }} 0.29%

score

0.83803

percentile