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Recorded 30 Oct 2026 at 18:02 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.

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
No known exploitation (MSRC assessment)
Publicly disclosed
No (MSRC assessment)
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: follow the MSRC remediation guidance
Affected products
.NET 10.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime 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 runtime installed on Windows, ASP.NET Core 8.0 (restart required); KB5126105: .NET 9.0 runtime installed on Windows, ASP.NET Core 9.0 (restart required); KB5126106: .NET 10.0 runtime installed on Windows, ASP.NET Core 10.0 (restart required)
CISA KEV
Not listed in the collected catalog
EPSS
0.9%; scored 30 Oct 2026
Public detection template
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.
Public exploit code
No Nuclei template listed

Source evidence when recorded

Microsoft security releases
Complete at observationRead 30 Oct 2026 at 18:01 UTC
CISA KEV
Complete at observationRead 30 Oct 2026 at 18:01 UTC
FIRST EPSS
Complete at observationRead 30 Oct 2026 at 18:01 UTC
Public detection templates (Nuclei)
Complete at observationRead 30 Oct 2026 at 18:01 UTC

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

What changed

  1. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
  2. Fixes: 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) → KB5126104: .NET 8.0 runtime installed on Windows, ASP.NET Core 8.0 (restart required); KB5126105: .NET 9.0 runtime installed on Windows, ASP.NET Core 9.0 (restart required); KB5126106: .NET 10.0 runtime installed on Windows, ASP.NET Core 10.0 (restart required) · 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 → .NET 10.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime 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
  3. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  4. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
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 (36)

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

  1. 30 Oct 2026 · 18:02:45 UTC EPSS0.9%; scored 29 Oct 2026 → 0.9%; scored 30 Oct 2026
  2. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  3. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  4. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  5. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  6. 29 Oct 2026 · 18:33:30 UTC EPSS0.9%; scored 28 Oct 2026 → 0.9%; scored 29 Oct 2026
  7. 28 Oct 2026 · 20:00:33 UTC EPSS0.9%; scored 27 Oct 2026 → 0.9%; scored 28 Oct 2026
  8. 27 Oct 2026 · 16:51:02 UTC Updates that fix itKB5126104: .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) → KB5126104: .NET 8.0 runtime installed on Windows, ASP.NET Core 8.0 (restart required); KB5126105: .NET 9.0 runtime installed on Windows, ASP.NET Core 9.0 (restart required); KB5126106: .NET 10.0 runtime installed on Windows, ASP.NET Core 10.0 (restart required)
  9. 27 Oct 2026 · 16:51:02 UTC 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 → .NET 10.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime 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
  10. 27 Oct 2026 · 15:48:13 UTC EPSS0.9%; scored 26 Oct 2026 → 0.9%; scored 27 Oct 2026
  11. 26 Oct 2026 · 23:57:09 UTC EPSS0.9%; scored 25 Oct 2026 → 0.9%; scored 26 Oct 2026
  12. 25 Oct 2026 · 17:12:51 UTC EPSS0.9%; scored 24 Oct 2026 → 0.9%; scored 25 Oct 2026
  13. 25 Oct 2026 · 01:34:18 UTC EPSS0.9%; scored 23 Oct 2026 → 0.9%; scored 24 Oct 2026
  14. 23 Oct 2026 · 15:51:28 UTC EPSS0.9%; scored 22 Oct 2026 → 0.9%; scored 23 Oct 2026
  15. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  16. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  17. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  18. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  19. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  20. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  21. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  22. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  23. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  24. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  25. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  26. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  27. 22 Oct 2026 · 17:33:15 UTC EPSS0.9%; scored 21 Oct 2026 → 0.9%; scored 22 Oct 2026
  28. 21 Oct 2026 · 21:47:24 UTC EPSS0.9%; scored 20 Oct 2026 → 0.9%; scored 21 Oct 2026
  29. 20 Oct 2026 · 20:53:31 UTC EPSS0.9%; scored 19 Oct 2026 → 0.9%; scored 20 Oct 2026
  30. 19 Oct 2026 · 15:12:40 UTC EPSS0.9%; scored 18 Oct 2026 → 0.9%; scored 19 Oct 2026
  31. 18 Oct 2026 · 14:54:30 UTC EPSS0.9%; scored 16 Oct 2026 → 0.9%; scored 18 Oct 2026
  32. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  33. 16 Oct 2026 · 16:13:25 UTC EPSS0.9%; scored 15 Oct 2026 → 0.9%; scored 16 Oct 2026
  34. 15 Oct 2026 · 21:30:54 UTC EPSS0.9%; scored 14 Oct 2026 → 0.9%; scored 15 Oct 2026
  35. 15 Oct 2026 · 01:07:54 UTC EPSS0.9%; scored 13 Oct 2026 → 0.9%; scored 14 Oct 2026
  36. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

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Sources read 11 Nov 04:44 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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