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Recorded 27 Oct 2026 at 15:48 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 Elevation of Privilege Vulnerability

Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

What it said

CVE
CVE-2026-70179
Severity
Important
CVSS base score
7.5
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Elevation of Privilege
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
ASP.NET Core
Weakness
CWE-290: Authentication Bypass by Spoofing
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Windows
Updates that fix it
No KB listed
CISA KEV
Not listed in the collected catalog
EPSS
0.6%; scored 27 Oct 2026
Public exploit code
No Nuclei template listed
Published
13 Oct 2026 07:00 UTC
Last revised
15 Oct 2026 07:00 UTC
Revision note
Updated the Security Updates table to add download and KB article links for Microsoft Visual Studio. This is an informational change only; the fixed builds are unchanged.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 27 Oct 2026 at 15:46 UTC
CISA KEV
Complete at observationRead 27 Oct 2026 at 15:46 UTC
FIRST EPSS
Complete at observationRead 27 Oct 2026 at 15:46 UTC
Public detection templates (Nuclei)
Complete at observationRead 27 Oct 2026 at 15:46 UTC

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

What changed

  1. 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
  2. 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
  3. Affected products: Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Windows → Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Windows
  4. Publisher revision note: Information published. → Updated the Security Updates table to add download and KB article links for Microsoft Visual Studio. This is an informational change only; the fixed builds are unchanged.
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 (29)

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

  1. 27 Oct 2026 · 15:48:13 UTC EPSS0.6%; scored 26 Oct 2026 → 0.6%; scored 27 Oct 2026
  2. 26 Oct 2026 · 23:57:09 UTC EPSS0.6%; scored 25 Oct 2026 → 0.6%; scored 26 Oct 2026
  3. 25 Oct 2026 · 17:12:51 UTC EPSS0.6%; scored 24 Oct 2026 → 0.6%; scored 25 Oct 2026
  4. 25 Oct 2026 · 01:34:18 UTC EPSS0.6%; scored 23 Oct 2026 → 0.6%; scored 24 Oct 2026
  5. 23 Oct 2026 · 15:51:28 UTC EPSS0.6%; scored 22 Oct 2026 → 0.6%; scored 23 Oct 2026
  6. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  7. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  8. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  9. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  10. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  11. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  12. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  13. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  14. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  15. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  16. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  17. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  18. 22 Oct 2026 · 22:02:57 UTC Affected productsMicrosoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 installed on Windows → Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 10.0 runtime installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 8.0 runtime installed on Windows, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Linux, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Mac OS, Microsoft.AspNetCore.Authentication.Negotiate on .NET 9.0 runtime installed on Windows
  19. 22 Oct 2026 · 17:33:15 UTC EPSS0.6%; scored 21 Oct 2026 → 0.6%; scored 22 Oct 2026
  20. 21 Oct 2026 · 21:47:24 UTC EPSS0.6%; scored 20 Oct 2026 → 0.6%; scored 21 Oct 2026
  21. 20 Oct 2026 · 20:53:31 UTC EPSS0.6%; scored 19 Oct 2026 → 0.6%; scored 20 Oct 2026
  22. 19 Oct 2026 · 15:12:40 UTC EPSS0.6%; scored 18 Oct 2026 → 0.6%; scored 19 Oct 2026
  23. 18 Oct 2026 · 14:54:30 UTC EPSS0.6%; scored 16 Oct 2026 → 0.6%; scored 18 Oct 2026
  24. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
  25. 16 Oct 2026 · 16:13:25 UTC EPSS0.6%; scored 15 Oct 2026 → 0.6%; scored 16 Oct 2026
  26. 15 Oct 2026 · 21:30:54 UTC Revision noteInformation published. → Updated the Security Updates table to add download and KB article links for Microsoft Visual Studio. This is an informational change only; the fixed builds are unchanged.
  27. 15 Oct 2026 · 21:30:54 UTC Last revised13 Oct 2026 07:00 UTC → 15 Oct 2026 07:00 UTC
  28. 15 Oct 2026 · 21:30:54 UTC EPSS0.6%; scored 14 Oct 2026 → 0.6%; scored 15 Oct 2026
  29. 15 Oct 2026 · 01:07:54 UTC EPSSNot scored → 0.6%; scored 14 Oct 2026
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 8 Nov 07:24 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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