CVE-2026-23674 — MapUrlToZone Security Feature Bypass Vulnerability

Executive Summary

Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to bypass a security feature over a network.

Overview

7.5

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Exploitation Unlikely

MS Exploit Likelihood

Category Security Feature Bypass

Released Mar 10 2026

Last Updated Mar 10 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.01191 — 0.63924 percentile

NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

None

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.5

EPSS Score

0.01191

probability of exploitation in the next 30 days

0.63924 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

19 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 Version 1607 for 32-bit Systems	`5078938 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1607 for x64-based Systems	`5078938 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1809 for 32-bit Systems	`5078752 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 1809 for x64-based Systems	`5078752 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 21H2 for 32-bit Systems	`5078885 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 21H2 for ARM64-based Systems	`5078885 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 21H2 for x64-based Systems	`5078885 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 22H2 for 32-bit Systems	`5078885 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 22H2 for ARM64-based Systems	`5078885 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 10 Version 22H2 for x64-based Systems	`5078885 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 11 Version 23H2 for ARM64-based Systems	`5078883 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 11 Version 23H2 for x64-based Systems	`5078883 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 11 Version 24H2 for ARM64-based Systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Security Feature Bypass 5077181 5077212 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 10.0.26100.8037 10.0.26100.7979 Yes None Windows 11 Version 24H2 for x64-based Systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Security Feature Bypass 5077181 5077212 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 10.0.26100.8037 10.0.26100.7979 Yes None Windows 11 Version 25H2 for ARM systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Security Feature Bypass 5077181 5077212 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 10.0.26200.8037 10.0.26200.7979 Yes None Windows 11 Version 25H2 for x64-based Systems 5079473 (Security Update) 5079420 (Security Hotpatch Update) Important Security Feature Bypass 5077181 5077212 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 10.0.26200.8037 10.0.26200.7979 Yes None Windows 11 Version 26H1 for ARM64-based Systems	`5079466 (Security Update)`	Important	Security Feature Bypass	Yes
Windows 11 version 26H1 for x64-based Systems	`5079466 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2012 5078775 (Monthly Rollup) 5078738 (IE Cumulative) Important Security Feature Bypass 5075971 5066840 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 6.2.9200.25973 1.000 Yes None Windows Server 2012 (Server Core installation) 5078775 (Monthly Rollup) 5078738 (IE Cumulative) Important Security Feature Bypass 5075971 5066840 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 6.2.9200.25973 1.000 Yes None Windows Server 2012 R2 5078738 (IE Cumulative) 5078774 (Monthly Rollup) Important Security Feature Bypass 5066840 5075970 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 1.000 6.3.9600.23074 Yes None Windows Server 2012 R2 (Server Core installation) 5078738 (IE Cumulative) 5078774 (Monthly Rollup) Important Security Feature Bypass 5066840 5075970 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 1.000 6.3.9600.23074 Yes None Windows Server 2016	`5078938 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2016 (Server Core installation)	`5078938 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2019	`5078752 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2019 (Server Core installation)	`5078752 (Security Update)`	Important	Security Feature Bypass	Yes
Windows Server 2022 5078766 (Security Update) 5078737 (Security Hotpatch Update) Important Security Feature Bypass 5075906 5075943 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 10.0.20348.4893 10.0.20348.4830 Yes No None Windows Server 2022 (Server Core installation) 5078766 (Security Update) 5078737 (Security Hotpatch Update) Important Security Feature Bypass 5075906 5075943 Base: 7.5 Temporal: 6.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C 10.0.20348.4893 10.0.20348.4830 Yes No None Windows Server 2022, 23H2 Edition (Server Core installation)	`5078734 (Security Update)`	Important	Security Feature Bypass	Yes

Patches

6 patches

Article	Type	Restart
`5078938`	Security Update	Yes
`5078752`	Security Update	Yes
`5078885`	Security Update	Yes
`5078883`	Security Update	Yes
`5079466`	Security Update	Yes
`5078734`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Jonathan Birch

References

MSRC Advisory MITRE NVD