CVE-2026-78444: CWE-822: Untrusted Pointer Dereference in Microsoft Windows 10 Version 1809
Description
Untrusted pointer dereference in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.1high
Affected software
Microsoft
Windows 10 Version 1809
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-2026-78444) involves an untrusted pointer dereference in the Windows Failover Cluster feature of Microsoft Windows 10 Version 1809. An attacker can exploit this flaw remotely without privileges or user interaction to execute arbitrary code. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity with network attack vector, high impact on confidentiality, integrity, and availability, and requires a high attack complexity. Microsoft has published an official fix for affected versions.
Potential Impact
Successful exploitation allows remote code execution by an unauthorized attacker over the network, potentially leading to full system compromise including confidentiality, integrity, and availability impacts.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78444 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-24T16:21:50.286Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78444","vendor":"Microsoft"}]
Threat ID: 6aa0455eacd9273b49faa0f5
Added to database: 09/08/2026, 17:26:54 UTC
Last enriched: 10/14/2026, 21:59:55 UTC
Last updated: 10/22/2026, 13:15:23 UTC
Views: 33
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