CVE-2026-88099
Medium
Description
Uncaught exception in Windows Failover Cluster allows an unauthorized attacker to deny service over a network.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Microsoft Windows Server
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-248CWE-248
How to fix
Update
- microsoft windows_server_201910.0.17763.9376 or later
- microsoft windows_server_202210.0.20348.5761 or later
- microsoft windows_server_202510.0.26100.33650 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_server_2019 | v < 10.0.17763.9376 | 10.0.17763.9376 |
| microsoft windows_server_2022 | v < 10.0.20348.5761 | 10.0.20348.5761 |
| microsoft windows_server_2025 | v < 10.0.26100.33650 | 10.0.26100.33650 |
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