CVE-2021-33763

21

FAUCET Score

CVE-2021-33763 is an information disclosure vulnerability in the Windows Remote Access Connection Manager affecting various versions of Windows 10, 8.1, and Server. With a CVSS score of 5.5 (Medium), it allows a local, low-privileged attacker to achieve high confidentiality impact without user interaction. While not actively exploited (KEV: No) and lacking public exploit code, it has received some community discussion and media coverage, indicating awareness within the cybersecurity landscape.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10:-:::::::*
		20h2CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10:20h2:::::::*
		21h1CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10:21h1:::::::*
		1607CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10:1607:::::::*
		1809CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10:1809:::::::*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

1.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.76%

Probability of exploitation in next 30 days

EPSS Percentile

51.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0076 is in the 95th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (33)

microsoftpatch availablevia nvd_reference

microsoftpatch availablevia msrc

Product: Windows 10 Version 1809 for 32-bit SystemsFixed in: 10.0.17763.2061

microsoftpatch availablevia msrc

Product: Windows 10 Version 1809 for x64-based SystemsFixed in: 10.0.17763.2061

microsoftpatch availablevia msrc

Product: Windows 10 Version 1809 for ARM64-based SystemsFixed in: 10.0.17763.2061

microsoftpatch availablevia msrc

Product: Windows Server 2019Fixed in: 10.0.17763.2061

microsoftpatch availablevia msrc

Product: Windows Server 2019 (Server Core installation)Fixed in: 10.0.17763.2061

microsoftpatch availablevia msrc

Product: Windows 10 Version 1909 for 32-bit SystemsFixed in: 10.0.18363.1679

microsoftpatch availablevia msrc

Product: Windows 10 Version 1909 for x64-based SystemsFixed in: 10.0.18363.1679

microsoftpatch availablevia msrc

Product: Windows 10 Version 1909 for ARM64-based SystemsFixed in: 10.0.18363.1679

microsoftpatch availablevia msrc

Product: Windows 10 Version 21H1 for x64-based SystemsFixed in: 10.0.19043.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 21H1 for ARM64-based SystemsFixed in: 10.0.19043.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 21H1 for 32-bit SystemsFixed in: 10.0.19043.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 2004 for 32-bit SystemsFixed in: 10.0.19041.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 2004 for ARM64-based SystemsFixed in: 10.0.19041.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 2004 for x64-based SystemsFixed in: 10.0.19041.1110

microsoftpatch availablevia msrc

Product: Windows Server, version 2004 (Server Core installation)Fixed in: 10.0.19041.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 20H2 for x64-based SystemsFixed in: 10.0.19042.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 20H2 for 32-bit SystemsFixed in: 10.0.19042.1110

microsoftpatch availablevia msrc

Product: Windows 10 Version 20H2 for ARM64-based SystemsFixed in: 10.0.19042.1110

microsoftpatch availablevia msrc

Product: Windows Server, version 20H2 (Server Core Installation)Fixed in: 10.0.19042.1110

microsoftpatch availablevia msrc

Product: Windows 10 for 32-bit SystemsFixed in: 10.0.10240.19003

microsoftpatch availablevia msrc

Product: Windows 10 for x64-based SystemsFixed in: 10.0.10240.19003

microsoftpatch availablevia msrc

Product: Windows 10 Version 1607 for 32-bit SystemsFixed in: 10.0.14393.4530

microsoftpatch availablevia msrc

Product: Windows 10 Version 1607 for x64-based SystemsFixed in: 10.0.14393.4530

microsoftpatch availablevia msrc

Product: Windows Server 2016Fixed in: 10.0.14393.4530

microsoftpatch availablevia msrc

Product: Windows Server 2016 (Server Core installation)Fixed in: 10.0.14393.4530

microsoftpatch availablevia msrc

Product: Windows 8.1 for 32-bit systemsFixed in: 6.3.9600.20069

microsoftpatch availablevia msrc

Product: Windows 8.1 for x64-based systemsFixed in: 6.3.9600.20069

microsoftpatch availablevia msrc

Product: Windows Server 2012 R2Fixed in: 6.3.9600.20069

microsoftpatch availablevia msrc

Product: Windows Server 2012 R2 (Server Core installation)Fixed in: 6.3.9600.20069

microsoftpatch availablevia msrc

Product: Windows RT 8.1Fixed in: 6.3.9600.20069

microsoftpatch availablevia msrc

Product: Windows Server 2012Fixed in: 6.2.9200.23409

microsoftpatch availablevia msrc

Product: Windows Server 2012 (Server Core installation)Fixed in: 6.2.9200.23409

Vendor Advisories (1)

microsoft2021-Jul/CVE-2021-33763Important

Windows Remote Access Connection Manager Information Disclosure Vulnerability

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-33763

PatchVendor Advisory