CVE-2026-88099

MEDIUM

MEDIUM Priority: 0.05 BB Relevance: 62/100

Published: 2026-10-13 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Network No Auth No Interaction

AV: Network

AC: High

PR: None

UI: None

S: Unchanged

C: None

I: None

A: High

Uncaught exception in Windows Failover Cluster allows an unauthorized attacker to deny service over a network.

Vendor	Product	Version
Microsoft	Windows Server 2019	10.0.17763.0 < 10.0.17763.9376
Microsoft	Windows Server 2019	10.0.17763.0 < 10.0.17763.9376
Microsoft	Windows Server 2019	10.0.17763.0 < 10.0.17763.9376
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 < 10.0.17763.9376
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 < 10.0.17763.9376
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 < 10.0.17763.9376
Microsoft	Windows Server 2022	10.0.20348.0 < 10.0.20348.5761
Microsoft	Windows Server 2022	10.0.20348.0 < 10.0.20348.5761
Microsoft	Windows Server 2022	10.0.20348.0 < 10.0.20348.5761
Microsoft	Windows Server 2025	10.0.26100.0 < 10.0.26100.33650
Microsoft	Windows Server 2025	10.0.26100.0 < 10.0.26100.33650
Microsoft	Windows Server 2025	10.0.26100.0 < 10.0.26100.33650
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 < 10.0.26100.33650
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 < 10.0.26100.33650
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 < 10.0.26100.33650
microsoft	windows_server_2019	< 10.0.17763.9376
microsoft	windows_server_2022	< 10.0.20348.5761
microsoft	windows_server_2025	< 10.0.26100.33650

vendor-advisory patch

62 / 100

✓ Network accessible
✓ No authentication
✓ No user interaction

5.9 / 10.0 v3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

0.82%

Raw Score 0.008180

Percentile 57.1%

Date 2026-10-29

2026-10-29

0.00818

2026-10-28

0.00818

mitre ref →