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Vulnerability Assessment

Weakness
CWE
CWE-820
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Missing synchronization
Impact

CVSS 6.8. EPSS 0.2%. No patch confirmed.
Exploit ScenarioDerived

An attacker could exploit this vulnerability in Missing synchronization in Windows Hyper-V to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 16, 2026

A security vulnerability in Missing synchronization in Windows Hyper-V (CVSS 6.8) that allows an authorized attacker. Remediation should follow standard vulnerability management procedures.

Earlier versions of this analysis (1)
v1 Mar 16, 2026 - 04:21 CVSS 6.8

Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.

RemediationAI

Monitor vendor channels for patch availability.

Affected VersionsENISA

Windows Server 2022 10.0.20348.0 <10.0.20348.3932
Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.6093
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.4652
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.4652
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.7558
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 <10.0.25398.1732
Windows 10 Version 1607 10.0.14393.0 <10.0.14393.8246
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.6093
Windows Server 2016 (Server Core installation) 10.0.14393.0 <10.0.14393.8246
Windows Server 2019 10.0.17763.0 <10.0.17763.7558
Windows 11 version 22H3 10.0.22631.0 <10.0.22631.5624
Windows 11 version 22H2 10.0.22621.0 <10.0.22621.5624
Windows Server 2025 10.0.26100.0 <10.0.26100.4652
Windows Server 2016 10.0.14393.0 <10.0.14393.8246
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.7558
Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.5624

Affected Packages

euvd windows_10_version_1607 fix: 10.0.14393.8246
euvd windows_10_version_1809 fix: 10.0.17763.7558
euvd windows_10_version_21h2 fix: 10.0.19044.6093
euvd windows_10_version_22h2 fix: 10.0.19045.6093
euvd windows_11_version_22h2 fix: 10.0.22621.5624
euvd windows_11_version_22h3 fix: 10.0.22631.5624
euvd windows_11_version_23h2 fix: 10.0.22631.5624
euvd windows_11_version_24h2 fix: 10.0.26100.4652
euvd windows_server_2016 fix: 10.0.14393.8246
euvd windows_server_2016_server_core_installation fix: 10.0.14393.8246
euvd windows_server_2019 fix: 10.0.17763.7558
euvd windows_server_2019_server_core_installation fix: 10.0.17763.7558
euvd windows_server_2022 fix: 10.0.20348.3932
euvd windows_server_2022_23h2_edition_server_core_installation fix: 10.0.25398.1732
euvd windows_server_2025 fix: 10.0.26100.4652
euvd windows_server_2025_server_core_installation fix: 10.0.26100.4652

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 16 packages in euvd

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Technical ContextAI · show details

Vulnerability type not specified by vendor. Affects Missing synchronization in Windows Hyper-V.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 6.8 MEDIUM
AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
10.0.20348.3932,10.0.19045.6093,10.0.26100.4652
CVE Published
Jul 08, 2025 - 17:15 nvd
MEDIUM 6.8

DescriptionCVE.org

Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.

Executive ViewAI

Why It Matters

Organizations using Missing synchronization in Windows Hyper-V should be aware of notable risk from CVE-2025-47999 rated CVSS 6.8. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Moderate
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.2%
Top 64% exploitable
Data Quality
4 sources
Confidence: Medium
EUVD NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

Exploitation· derived
None
System Exposure· derived
Controlled
Automatable· derived
No

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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Same weakness CWE-820 – Missing Synchronization

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References

Advisories & patches
ADVISORY https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47999 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-47999

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