Medium
Windows Failover Cluster Denial of Service Vulnerability
Uncaught exception in Windows Failover Cluster allows an unauthorized attacker to deny service over a network.
Announced Source revision 1
Original source ↗CVE-2026-88099
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-88099
Windows Server 2019
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Windows Server 2019 (Server Core installation)
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Windows Server 2022
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Windows Server 2025
Source reference: /containers/cna/affected/3/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Windows Server 2025 (Server Core installation)
Source reference: /containers/cna/affected/4/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Microsoft",
"product": "Windows Server 2019",
"versions": [
{
"status": "affected",
"version": "10.0.17763.0",
"lessThan": "10.0.17763.9376",
"versionType": "custom"
}
],
"platforms": [
"x64-based Systems"
]
},
{
"vendor": "Microsoft",
"product": "Windows Server 2019 (Server Core installation)",
"versions": [
{
"status": "affected",
"version": "10.0.17763.0",
"lessThan": "10.0.17763.9376",
"versionType": "custom"
}
],
"platforms": [
"x64-based Systems"
]
},
{
"vendor": "Microsoft",
"product": "Windows Server 2022",
"versions": [
{
"status": "affected",
"version": "10.0.20348.0",
"lessThan": "10.0.20348.5761",
"versionType": "custom"
}
],
"platforms": [
"x64-based Systems"
]
},
{
"vendor": "Microsoft",
"product": "Windows Server 2025",
"versions": [
{
"status": "affected",
"version": "10.0.26100.0",
"lessThan": "10.0.26100.33650",
"versionType": "custom"
}
],
"platforms": [
"x64-based Systems"
]
},
{
"vendor": "Microsoft",
"product": "Windows Server 2025 (Server Core installation)",
"versions": [
{
"status": "affected",
"version": "10.0.26100.0",
"lessThan": "10.0.26100.33650",
"versionType": "custom"
}
],
"platforms": [
"x64-based Systems"
]
}
]- Related CVEs
- CVE-2026-88099
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #54791 · Revision 1
- Added to Heist Feed
- Publisher date