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CVE

CVE-2025-21276

Windows MapUrlToZone Denial of Service Vulnerability

Windows MapUrlToZone Denial of Service Vulnerability.

HIGH · CVSS 7.5 EPSS 0.06777
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Weakness Classification

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-693Protection Mechanism Failure
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Affected Products & Versions

15
microsoft windows 10 1507< 10.0.10240.20890
microsoft windows 10 1607< 10.0.14393.7699
microsoft windows 10 1809< 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
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Jan 2025 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2025-21276Denial of Service
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