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Recorded 18 Oct 2026 at 14:54 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

.NET Denial of Service Vulnerability

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

What it said

CVE
CVE-2026-69651
Severity
Important
CVSS base score
7.5
CVSS vector
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
Impact
Denial of Service
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
.NET
Weakness
CWE-407: Inefficient Algorithmic Complexity
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
.NET 10.0 installed on Linux, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Windows, .NET 11.0 installed on Linux, .NET 11.0 installed on Mac OS, .NET 11.0 installed on Windows, .NET 8.0 installed on Linux, .NET 8.0 installed on Mac OS, .NET 8.0 installed on Windows, .NET 9.0 installed on Linux, .NET 9.0 installed on Mac OS, .NET 9.0 installed on Windows, Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 1607, Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016, Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025, Microsoft .NET Framework 3.5 on Windows 11 version 26H1, Microsoft .NET Framework 3.5 on Windows Server 2012, Microsoft .NET Framework 3.5 on Windows Server 2012 R2, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2, Microsoft .NET Framework 4.8 on Windows 10 version 1607, Microsoft .NET Framework 4.8 on Windows Server 2012, Microsoft .NET Framework 4.8 on Windows Server 2012 R2, Microsoft .NET Framework 4.8 on Windows Server 2016, Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10
Updates that fix it
KB5126868: Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 1607, Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016; KB5127660: Microsoft .NET Framework 3.5 on Windows Server 2012; KB5127664: Microsoft .NET Framework 3.5 on Windows Server 2012 R2; KB5127666: Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019, Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809; KB5127667: Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012; KB5127668: Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2; KB5127683: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2; KB5127684: Microsoft .NET Framework 4.8 on Windows 10 version 1607, Microsoft .NET Framework 4.8 on Windows Server 2016; KB5127685: Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809, Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019; KB5127686: Microsoft .NET Framework 4.8 on Windows Server 2012; KB5127687: Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022; KB5127688: Microsoft .NET Framework 4.8 on Windows Server 2012 R2; KB5127689: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2; KB5127690: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2, Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025; KB5127691: Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1; KB5127692: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2; KB5127693: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022; KB5127694: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2; KB5127696: Microsoft .NET Framework 3.5 on Windows 11 version 26H1; KB5130034: .NET 8.0 installed on Linux, .NET 8.0 installed on Mac OS, .NET 8.0 installed on Windows; KB5130035: .NET 9.0 installed on Linux, .NET 9.0 installed on Mac OS, .NET 9.0 installed on Windows; KB5130036: .NET 10.0 installed on Linux, .NET 10.0 installed on Mac OS, .NET 10.0 installed on Windows
CISA KEV
Not listed in the collected catalog
EPSS
1.1%; scored 18 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 KB article links for .NET 11.0. This is an informational change only; the fixed builds are unchanged.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 18 Oct 2026 at 14:53 UTC
CISA KEV
Complete at observationRead 18 Oct 2026 at 14:53 UTC
FIRST EPSS
Complete at observationRead 18 Oct 2026 at 14:53 UTC
Public detection templates (Nuclei)
Complete at observationRead 18 Oct 2026 at 14:53 UTC

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

What changed

  1. Publisher revision note: Information published. → Updated the Security Updates table to add KB article links for .NET 11.0. 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 (7)

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

  1. 18 Oct 2026 · 14:54:30 UTC EPSS1.1%; scored 16 Oct 2026 → 1.1%; scored 18 Oct 2026
  2. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
  3. 16 Oct 2026 · 16:13:25 UTC EPSS1.1%; scored 15 Oct 2026 → 1.1%; scored 16 Oct 2026
  4. 15 Oct 2026 · 21:30:54 UTC Revision noteInformation published. → Updated the Security Updates table to add KB article links for .NET 11.0. This is an informational change only; the fixed builds are unchanged.
  5. 15 Oct 2026 · 21:30:54 UTC Last revised13 Oct 2026 07:00 UTC → 15 Oct 2026 07:00 UTC
  6. 15 Oct 2026 · 21:30:54 UTC EPSS1.1%; scored 14 Oct 2026 → 1.1%; scored 15 Oct 2026
  7. 15 Oct 2026 · 01:07:54 UTC EPSSNot scored → 1.1%; 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 06:21 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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