How severe is CVE-2025-49751?

CVE-2025-49751 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-49751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-49751?

CVE-2025-49751 primarily affects Microsoft Windows 10 1607. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-49751?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-49751 have an EU (EUVD) identifier?

Yes. CVE-2025-49751 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24379.

When was CVE-2025-49751 published?

CVE-2025-49751 was published on 2025-08-12 and last updated on 2026-06-17.

CVE-2025-49751

CVE-2025-49751 is a medium-severity vulnerability in Microsoft Windows 10 1607 with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-820.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24379
Weakness: CWE-820
Affected product: Microsoft Windows 10 1607
Published: 2025-08-12
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-49751?: Missing synchronization in Windows Hyper-V allows an authorized attacker to deny service over an adjacent network.
How severe is CVE-2025-49751?: CVE-2025-49751 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-49751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-49751?: CVE-2025-49751 primarily affects Microsoft Windows 10 1607. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-49751?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-49751 have an EU (EUVD) identifier?: Yes. CVE-2025-49751 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24379.
When was CVE-2025-49751 published?: CVE-2025-49751 was published on 2025-08-12 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49751

Affected products (12)

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

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