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Vulnerabilities

Vulnerability · CVE-2025-47999

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

Published Jul 8, 2025 · catalog updated Feb 13, 2026 · Microsoft Windows Server 2022

Check this week

CVE-2025-47999 is not in CISA KEV. FIRST estimates a 48.00% chance of exploitation in the next 30 days. Check whether you run Microsoft Windows Server 2022.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
48.00%
Remediation
Version ranges on file
Affected products
vendor Microsoft Windows Server 2022 10.0.20348.0 <10.0.20348.3932

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Microsoft Windows Server 2022 10.0.20348.0 <10.0.20348.393210.0.20348.0 <10.0.20348.3932

How to fix CVE-2025-47999

  • Recommended remediation

    Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-47999 is not in CISA KEV. FIRST estimates a 48.00% chance of exploitation in the next 30 days. Check whether you run Microsoft Windows Server 2022.

Which versions are affected?

Compare what you have installed with Microsoft Windows Server 2022 10.0.20348.0 <10.0.20348.3932 10.0.20348.0 <10.0.20348.3932. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 48.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 8, 2025 · EUVD

    Detected

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

  2. Feb 13, 2026 · EUVD

    Updated

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

Sources

  • EUVDVulnerability recordEUVD-2025-20541

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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Feb 13, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.