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Recorded 15 Oct 2026 at 01:07 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.

CVEMicrosoft Security Response Center

ASP.NET Core Denial of Service Vulnerability

Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.

What it said

CVE
CVE-2026-69304
Severity
Important
CVSS base score
5.9
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Impact
Denial of Service
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
ASP.NET Core
Weakness
CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
.NET 10.0 installed on Windows, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, ASP.NET Core 10.0, ASP.NET Core 11.0, ASP.NET Core 8.0, ASP.NET Core 9.0, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.9
Updates that fix it
KB5126104: .NET 8.0 installed on Windows, ASP.NET Core 8.0 (restart required); KB5126105: .NET 9.0 installed on Windows, ASP.NET Core 9.0 (restart required); KB5126106: .NET 10.0 installed on Windows, ASP.NET Core 10.0 (restart required)
CISA KEV
Not listed in the collected catalog
EPSS
0.9%; scored 14 Oct 2026
Public exploit code
No Nuclei template listed
Published
8 Sep 2026 07:00 UTC
Last revised
25 Sep 2026 07:00 UTC
Revision note
Security Updates table updated provide links to the KB articles and download center updates. Microsoft recommends installing the updates.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 15 Oct 2026 at 01:07 UTC
CISA KEV
Complete at observationRead 15 Oct 2026 at 01:07 UTC
FIRST EPSS
Complete at observationRead 15 Oct 2026 at 01:07 UTC
Public detection templates (Nuclei)
Complete at observationRead 15 Oct 2026 at 01:07 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (2)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 15 Oct 2026 · 01:07:54 UTC EPSS0.9%; scored 13 Oct 2026 → 0.9%; scored 14 Oct 2026
  2. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 11 Nov 03:41 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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