---
id: CVE-2026-88099
title: >-
  Uncaught exception in Windows Failover Cluster allows an unauthorized attacker
  to deny service over a network.
summary: >-
  Uncaught exception in Windows Failover Cluster allows an unauthorized attacker
  to deny service over a network.
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-248
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:19:44.390'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88099'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88099'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:29.211Z'
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.