CVE-2025-21189

16

FAUCET Score

CVE-2025-21189 is a security feature bypass vulnerability, specifically a "MapUrlToZone" flaw, affecting Microsoft products. With a CVSS score of 4.3 (MEDIUM), it can be exploited remotely with low attack complexity, requiring user interaction, potentially leading to a loss of confidentiality. There is currently no evidence of active exploitation, no public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion, though it has been mentioned in one media article regarding Microsoft's January 2025 Patch Tuesday.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 10.0.10240.20890CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10_1507:::::::x64:*
		< 10.0.10240.20890CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10_1507:::::::x86:*
		< 10.0.14393.7699CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10_1607:::::::x64:*
		< 10.0.14393.7699CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10_1607:::::::x86:*
		< 10.0.17763.6775CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

2.91%

Probability of exploitation in next 30 days

EPSS Percentile

85.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0291 is in the 93rd percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 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 (48)

microsoftpatch availablevia nvd_reference

microsoftpatch availablevia msrc

Product: Windows 10 Version 1809 for 32-bit SystemsFixed in: 10.0.17763.6775

microsoftpatch availablevia msrc

Product: Windows 10 Version 1809 for x64-based SystemsFixed in: 10.0.17763.6775

microsoftpatch availablevia msrc

Product: Windows Server 2019Fixed in: 10.0.17763.6775

microsoftpatch availablevia msrc

Product: Windows Server 2019 (Server Core installation)Fixed in: 10.0.17763.6775

microsoftpatch availablevia msrc

Product: Windows Server 2022Fixed in: 10.0.20348.3091

microsoftpatch availablevia msrc

Product: Windows Server 2022 (Server Core installation)Fixed in: 10.0.20348.3091

microsoftpatch availablevia msrc

Product: Windows 10 Version 21H2 for 32-bit SystemsFixed in: 10.0.19044.5371

microsoftpatch availablevia msrc

Product: Windows 10 Version 21H2 for ARM64-based SystemsFixed in: 10.0.19044.5371

microsoftpatch availablevia msrc

Product: Windows 10 Version 21H2 for x64-based SystemsFixed in: 10.0.19044.5371

microsoftpatch availablevia msrc

Product: Windows 11 Version 22H2 for ARM64-based SystemsFixed in: 10.0.22621.4751

microsoftpatch availablevia msrc

Product: Windows 11 Version 22H2 for x64-based SystemsFixed in: 10.0.22621.4751

microsoftpatch availablevia msrc

Product: Windows 10 Version 22H2 for x64-based SystemsFixed in: 10.0.19045.5371

microsoftpatch availablevia msrc

Product: Windows 10 Version 22H2 for ARM64-based SystemsFixed in: 10.0.19045.5371

microsoftpatch availablevia msrc

Product: Windows 10 Version 22H2 for 32-bit SystemsFixed in: 10.0.19045.5371

microsoftpatch availablevia msrc

Product: Windows 11 Version 23H2 for ARM64-based SystemsFixed in: 10.0.22631.4751

microsoftpatch availablevia msrc

Product: Windows 11 Version 23H2 for x64-based SystemsFixed in: 10.0.22631.4751

microsoftpatch availablevia msrc

Product: Windows Server 2022, 23H2 Edition (Server Core installation)Fixed in: 10.0.25398.1369

microsoftpatch availablevia msrc

Product: Windows 11 Version 24H2 for ARM64-based SystemsFixed in: 10.0.26100.2894

microsoftpatch availablevia msrc

Product: Windows 11 Version 24H2 for x64-based SystemsFixed in: 10.0.26100.2894

microsoftpatch availablevia msrc

Product: Windows Server 2025Fixed in: 10.0.26100.2894

microsoftpatch availablevia msrc

Product: Windows Server 2025 (Server Core installation)Fixed in: 10.0.26100.2894

microsoftpatch availablevia msrc

Product: Windows 10 for 32-bit SystemsFixed in: 10.0.10240.20890

microsoftpatch availablevia msrc

Product: Windows 10 for x64-based SystemsFixed in: 10.0.10240.20890

microsoftpatch availablevia msrc

Product: Windows 10 Version 1607 for 32-bit SystemsFixed in: 10.0.14393.7699

microsoftpatch availablevia msrc

Product: Windows 10 Version 1607 for x64-based SystemsFixed in: 10.0.14393.7699

microsoftpatch availablevia msrc

Product: Windows Server 2016Fixed in: 10.0.14393.7699

microsoftpatch availablevia msrc

Product: Windows Server 2016 (Server Core installation)Fixed in: 10.0.14393.7699

microsoftpatch availablevia msrc

Product: Windows Server 2008 for 32-bit Systems Service Pack 2Fixed in: 6.0.6003.23070

microsoftpatch availablevia msrc

Product: Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)Fixed in: 6.0.6003.23070

microsoftpatch availablevia msrc

Product: Windows Server 2008 for x64-based Systems Service Pack 2Fixed in: 6.0.6003.23070

microsoftpatch availablevia msrc

Product: Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)Fixed in: 6.0.6003.23070

microsoftpatch availablevia msrc

Product: Windows Server 2008 for 32-bit Systems Service Pack 2Fixed in: 1.007

microsoftpatch availablevia msrc

Product: Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)Fixed in: 1.007

microsoftpatch availablevia msrc

Product: Windows Server 2008 for x64-based Systems Service Pack 2Fixed in: 1.007

microsoftpatch availablevia msrc

Product: Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)Fixed in: 1.007

microsoftpatch availablevia msrc

Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1Fixed in: 6.1.7601.27520

microsoftpatch availablevia msrc

Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Fixed in: 6.1.7601.27520

microsoftpatch availablevia msrc

Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1Fixed in: 1.003

microsoftpatch availablevia msrc

Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Fixed in: 1.003

microsoftpatch availablevia msrc

Product: Windows Server 2012Fixed in: 1.003

microsoftpatch availablevia msrc

Product: Windows Server 2012 (Server Core installation)Fixed in: 1.003

microsoftpatch availablevia msrc

Product: Windows Server 2012Fixed in: 6.2.9200.25273

microsoftpatch availablevia msrc

Product: Windows Server 2012 (Server Core installation)Fixed in: 6.2.9200.25273

microsoftpatch availablevia msrc

Product: Windows Server 2012 R2Fixed in: 6.3.9600.22371

microsoftpatch availablevia msrc

Product: Windows Server 2012 R2 (Server Core installation)Fixed in: 6.3.9600.22371

microsoftpatch availablevia msrc

Product: Windows Server 2012 R2Fixed in: 1.002

microsoftpatch availablevia msrc

Product: Windows Server 2012 R2 (Server Core installation)Fixed in: 1.002

Vendor Advisories (1)

microsoft2025-Jan/CVE-2025-21189Important

MapUrlToZone Security Feature Bypass Vulnerability

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2025-21189

PatchVendor Advisory