Review reviewHigh

CVE-2026-45591

Microsoft .NET 10.0, .NET 8.0, .NET 9.0

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability2.43%

Technical severityCVSS 7.5

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Product: Microsoft .NET 10.0, .NET 8.0, .NET 9.0
Affected versions: >= 10.0.0 < 10.0.9, >= 8.0.0 < 8.0.28, >= 9.0.0 < 9.0.17, >= 10.0 < 10.0.9, >= 8.0 < 8.0.28, >= 9.0 < 9.0.17, >= 18.6.0 < 18.6.3
Fixed versions: 8.0.28, 9.0.17, 10.0.9, 18.6.3

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft .NET 10.0, .NET 8.0, .NET 9.0 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.