Cyber Posture

CVE-2025-21276

High

Published: 14 January 2025

Published
14 January 2025
Modified
27 January 2025
KEV Added
—
Patch
—
CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0678 91.4th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Description

Windows MapUrlToZone Denial of Service Vulnerability

Security Summary

CVE-2025-21276 is a Denial of Service vulnerability affecting the MapUrlToZone component in Microsoft Windows operating systems. Published on January 14, 2025, it has a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and is associated with CWEs 191, 693, and NVD-CWE-noinfo.

The vulnerability can be exploited by an unauthenticated attacker over the network with low attack complexity and no user interaction required. Successful exploitation results in a denial of service condition, causing high impact to availability while having no impact on confidentiality or integrity.

Microsoft's Security Response Center provides detailed update guidance, including patches and mitigation recommendations, at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21276.

Details

CWE(s)
CWE-191CWE-693NVD-CWE-noinfo

Affected Products

microsoft
windows 10 1507
≤ 10.0.10240.20890 · ≤ 10.0.10240.20890
microsoft
windows 10 1607
≤ 10.0.14393.7699 · ≤ 10.0.14393.7699
microsoft
windows 10 1809
≤ 10.0.17763.6775 · ≤ 10.0.17763.6775
microsoft
windows 10 21h2
≤ 10.0.19044.5371
microsoft
windows 10 22h2
≤ 10.0.19045.5371
microsoft
windows 11 22h2
≤ 10.0.22621.4751
microsoft
windows 11 23h2
≤ 10.0.22631.4751
microsoft
windows 11 24h2
≤ 10.0.26100.2894
microsoft
windows server 2008
all versions, r2
microsoft
windows server 2012
all versions, r2
+5 more product configuration(s) — see NVD for full list

References