CVE-2026-96945: CWE-248: Uncaught Exception in Microsoft Windows Server 2019
Description
CVE-2026-96945 is a high-severity vulnerability in Microsoft Windows Server 2019 involving an uncaught exception in the Windows Failover Cluster component. This flaw allows an unauthorized attacker to cause a denial of service over the network. The vulnerability affects specific builds of Windows Server 2019 prior to their respective patched versions. An official fix is available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-96945) is caused by an uncaught exception in the Windows Failover Cluster feature of Microsoft Windows Server 2019. Exploitation can lead to denial of service (DoS) conditions remotely without requiring user interaction or privileges. The CVSS v3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has published an official fix addressing this issue.
Potential Impact
An attacker can remotely cause a denial of service on affected Windows Server 2019 systems by triggering an uncaught exception in the Failover Cluster service. This results in service disruption but does not impact confidentiality or integrity.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96945 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-23T20:35:19.928Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96945","vendor":"Microsoft"}]
Threat ID: 6ace85862cdf04f656a01848
Added to database: 10/13/2026, 19:24:54 UTC
Last enriched: 10/13/2026, 23:34:46 UTC
Last updated: 10/13/2026, 23:34:46 UTC
Views: 3
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