CVE-2026-88102: Windows Server 2019 10.0.17763.0 to before 10.0.17763.9376; +4 more affected products

Affected technology

Windows Server 2019 · 10.0.17763.0 to before 10.0.17763.9376
Microsoft

Windows Server 2019 (Server Core installation) · 10.0.17763.0 to before 10.0.17763.9376
Microsoft

Windows Server 2022 · 10.0.20348.0 to before 10.0.20348.5761
Microsoft

Windows Server 2025 · 10.0.26100.0 to before 10.0.26100.33650
Microsoft

Windows Server 2025 (Server Core installation) · 10.0.26100.0 to before 10.0.26100.33650
Microsoft

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source says use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network. Vendor/CNA’s CVSS 3.1 assessment (base score 9.8/10) rates confidentiality, integrity and availability impact as high.