High 7.5Published Jun 9, 2026

CVE-2026-45591ASP.NET Core Denial of Service Vulnerability

Updated under an hour ago (Oct 28, 2026, 8:40 AM ET)

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It affects Microsoft .NET 10.0 and 14 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Microsoft .NET 10.0

Exploited in the last 30 days

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

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: microsoft
NVD analysis: Modified
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft .NET 10.0 microsoft:net_10.0 (from the name)	from 10.0.0 before 10.0.9	CNA record
Microsoft .NET 8.0 microsoft:net_8.0 (from the name)	from 8.0.0 before 8.0.28	CNA record
Microsoft .NET 9.0 microsoft:net_9.0 (from the name)	from 9.0.0 before 9.0.17	CNA record
Microsoft ASP.NET Core 10.0 microsoft:asp.net_core_10.0 (from the name)	from 10.0 before 10.0.9	CNA record
Microsoft ASP.NET Core 8.0 microsoft:asp.net_core_8.0 (from the name)	from 8.0 before 8.0.28	CNA record
Microsoft ASP.NET Core 9.0 microsoft:asp.net_core_9.0 (from the name)	from 9.0 before 9.0.17	CNA record
Microsoft Microsoft Visual Studio 2026 version 18.6 microsoft:visual_studio_2026_version_18.6 (from the name)	from 18.6.0 before 18.6.3	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:8.0.128-1.el10_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:8.0.128-1.el10_0 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions redhat:rhel_e4s	from 0:8.0.128-1.el9_4 not affected	CISA ADP
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References

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591	vendor-advisory, patch
https://access.redhat.com/errata/RHSA-2026:17527
https://access.redhat.com/errata/RHSA-2026:25110
https://access.redhat.com/errata/RHSA-2026:25111
https://access.redhat.com/errata/RHSA-2026:25112
https://access.redhat.com/errata/RHSA-2026:25113
https://access.redhat.com/errata/RHSA-2026:25114
https://access.redhat.com/errata/RHSA-2026:25115
https://access.redhat.com/errata/RHSA-2026:25220
https://access.redhat.com/errata/RHSA-2026:25221
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.