MEDIUM
Windows Hyper-V Denial of Service Vulnerability
Published Aug 12, 2025
6.8
MEDIUMCVSS 3.1
EPSS 0.49%
Description
Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.
Affected products
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.8330
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.7678
- Version
-
- Version 10.0.19044.0StatusaffectedConstraints<10.0.19044.6216
- Version
-
- Version 10.0.19045.0StatusaffectedConstraints<10.0.19045.6216
- Version
-
- Version 10.0.22631.0StatusaffectedConstraints<10.0.22631.5768
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.4946
- Version
-
- Version 10.0.22621.0StatusaffectedConstraints<10.0.22621.5768
- Version
-
- Version 10.0.22631.0StatusaffectedConstraints<10.0.22631.5768
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.8330
- Version
-
- Version 10.0.14393.0StatusaffectedConstraints<10.0.14393.8330
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.7678
- Version
-
- Version 10.0.17763.0StatusaffectedConstraints<10.0.17763.7678
- Version
-
- Version 10.0.20348.0StatusaffectedConstraints<10.0.20348.4052
- Version
-
- Version 10.0.25398.0StatusaffectedConstraints<10.0.25398.1791
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.4946
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.4946
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | n/a |
| ||||||
| Microsoft | Windows 10 Version 1809 | n/a |
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| Microsoft | Windows 10 Version 21H2 | n/a |
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| Microsoft | Windows 10 Version 22H2 | n/a |
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| Microsoft | Windows 11 Version 23H2 | n/a |
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| Microsoft | Windows 11 Version 24H2 | n/a |
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| Microsoft | Windows 11 version 22H2 | n/a |
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| Microsoft | Windows 11 version 22H3 | n/a |
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| Microsoft | Windows Server 2016 | n/a |
| ||||||
| Microsoft | Windows Server 2016 (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2019 | n/a |
| ||||||
| Microsoft | Windows Server 2019 (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2022 | n/a |
| ||||||
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | n/a |
| ||||||
| Microsoft | Windows Server 2025 | n/a |
| ||||||
| Microsoft | Windows Server 2025 (Server Core installation) | n/a |
|
OR
- < 10.0.14393.8330
- < 10.0.17763.7678
- < 10.0.19044.6216
- < 10.0.19045.6216
- < 10.0.22621.5768
- < 10.0.22631.5768
- < 10.0.26100.4851
- < 10.0.14393.8330
- < 10.0.17763.7678
- < 10.0.20348.3989
- < 10.0.25398.1791
- < 10.0.26100.4851
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
6.8 MEDIUM CVE.org
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C
Attack Vector Adjacent
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
Exploit Maturity Unreported
1 other source (NVD) ▾
6.8 MEDIUM NVD
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector Adjacent
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 12, 2025 · SSVC 2.0.3
0.49% 0.00490
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.00490
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.49% (0.00490) | 39.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.43% (0.00426) | 33.80th | v5 (v2026.06.15) |
| Aug 13, 2025 | 0.18% (0.00184) | 40.44th | v4 (v2025.03.14) |
Weaknesses (1)
References (1)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49751 vendor-advisorypatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49751 | vendor-advisorypatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Aug 12, 2025
Updated Feb 13, 2026
Reserved Jun 9, 2025
Link CVE-2025-49751
CISA Vulnrichment
Updated Aug 12, 2025