From 65ca28f25f3ac5474d23b6a7cf60693042ae9c0b Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 08:19:31 -0700 Subject: [PATCH 1/7] October Preview Update --- ...10-28-october-cumulative-update-preview.md | 97 +++++++++++++++++++ docs/framework/release-notes/release-notes.md | 5 +- docs/framework/toc.yml | 2 + 3 files changed, 102 insertions(+), 2 deletions(-) create mode 100644 docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md diff --git a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md new file mode 100644 index 0000000000000..220281de0cac5 --- /dev/null +++ b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md @@ -0,0 +1,97 @@ +--- +title: October 2025 cumulative update +description: Learn about the improvements in the .NET Framework October 2025 cumulative update. +ms.date: 10/14/2025 +--- +# October 2025 cumulative update + +_Released October 14, 2025_ + +## Summary of what's new in this release + +- [Security improvements](#security-improvements) +- [Quality and reliability improvements](#quality-and-reliability-improvements) + +### Security improvements + +#### CVE-2025-21176 – Remote Code Execution vulnerability + +This security update addresses a remote code execution vulnerability detailed in [CVE 2025-21176](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176). + +### Quality and reliability improvements + +There are no new quality and reliability improvements in this update. + +## Known issues in this release + +This release contains no known issues. + +## Summary tables + +The following table outlines the updates in this release. + +| Product version | Cumulative update | +| --- | --- | +| **Windows 11, version 25H2** | | +| .NET Framework 3.5, 4.8.1 | [5066128](https://support.microsoft.com/kb/5066128) | +| **Windows 11, version 24H2** | | +| .NET Framework 3.5, 4.8.1 | [5066131](https://support.microsoft.com/kb/5066131) | +| **Microsoft server operating system, version 24H2** | | +| .NET Framework 3.5, 4.8.1 | [5066131](https://support.microsoft.com/kb/5066131) | +| **Microsoft server operating system, version 23H2** | | +| .NET Framework 3.5, 4.8.1 | [5066129](https://support.microsoft.com/kb/5066129) | +| **Windows 11, version 22H2 and Windows 11, version 23H2** | | +| .NET Framework 3.5, 4.8.1 | [5066133](https://support.microsoft.com/kb/5066133) | +| **Microsoft server operating system, version 22H2** | **[5066743](https://support.microsoft.com/kb/5066743)** | +| .NET Framework 3.5, 4.8 | [5066139](https://support.microsoft.com/kb/5066139) | +| .NET Framework 3.5, 4.8.1 | [5066134](https://support.microsoft.com/kb/5066134) | +| **Microsoft server operating system, version 21H2** | **[5066743](https://support.microsoft.com/kb/5066743)** | +| .NET Framework 3.5, 4.8 | [5066139](https://support.microsoft.com/kb/5066139) | +| .NET Framework 3.5, 4.8.1 | [5066134](https://support.microsoft.com/kb/5066134) | +| **Windows 10, version 22H2** | **[5066747](https://support.microsoft.com/kb/5066747)** | +| .NET Framework 3.5, 4.8 | [5066135](https://support.microsoft.com/kb/5066135) | +| .NET Framework 3.5, 4.8.1 | [5066130](https://support.microsoft.com/kb/5066130) | +| **Windows 10, version 21H2** | **[5066746](https://support.microsoft.com/kb/5066746)** | +| .NET Framework 3.5, 4.8 | [5066135](https://support.microsoft.com/kb/5066135) | +| .NET Framework 3.5, 4.8.1 | [5066130](https://support.microsoft.com/kb/5066130) | +| **Windows 10 1809 and Windows Server 2019** | **[5066738](https://support.microsoft.com/kb/5066738)** | +| .NET Framework 3.5, 4.7.2 | [5066143](https://support.microsoft.com/kb/5066143) | +| .NET Framework 3.5, 4.8 | [5066137](https://support.microsoft.com/kb/5066137) | +| **Windows 10 1607 and Windows Server 2016** | | +| .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066836](https://support.microsoft.com/kb/5066836) | +| .NET Framework 4.8 | [5066136](https://support.microsoft.com/kb/5066136) | +| **Windows 10 1507** | | +| .NET Framework 3.5, 4.6, 4.6.2 | [5066837](https://support.microsoft.com/kb/5066837) | + +The following table is for earlier Windows and Windows Server versions for Security and Quality Rollup updates.   + +| Product version | Security and quality rollup | +| --- | --- | +| **Windows Server 2012 R2** | **[5066741](https://support.microsoft.com/kb/5066741)** | +| .NET Framework 3.5 | [5066151](https://support.microsoft.com/kb/5066151) | +| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066145](https://support.microsoft.com/kb/5066145) | +| .NET Framework 4.8 | [5066140](https://support.microsoft.com/kb/5066140) | +| **Windows Server 2012** | **[5066740](https://support.microsoft.com/kb/5066740)** | +| .NET Framework 3.5 | [5066148](https://support.microsoft.com/kb/5066148) | +| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066144](https://support.microsoft.com/kb/5066144) | +| .NET Framework 4.8 | [5066138](https://support.microsoft.com/kb/5066138) | +| **Windows Server 2008 R2** | **[5066739](https://support.microsoft.com/kb/5066739)** | +| .NET Framework 3.5.1 | [5066150](https://support.microsoft.com/kb/5066150) | +| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066146](https://support.microsoft.com/kb/5066146)| +| .NET Framework 4.8 |[5066141](https://support.microsoft.com/kb/5066141) | +| **Windows Server 2008** | **[5066742](https://support.microsoft.com/kb/5066742)** | +| .NET Framework 2.0, 3.0 | [5066149](https://support.microsoft.com/kb/5066149) | +| .NET Framework 3.5 SP1 | [5040673](https://support.microsoft.com/kb/5040673) | +| .NET Framework 4.6.2 | [5066146](https://support.microsoft.com/kb/5066146) | + +| Product version | Security Only Update | +| --- | --- | +| **Windows Server 2008 R2** | **[5066748](https://support.microsoft.com/kb/5066748)** | +| .NET Framework 3.5.1 | [5066728](https://support.microsoft.com/kb/5066728) | +| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066726](https://support.microsoft.com/kb/5066726)| +| .NET Framework 4.8 |[5066725](https://support.microsoft.com/kb/5066725) | +| **Windows Server 2008** | **[5066749](https://support.microsoft.com/kb/5066749)** | +| .NET Framework 2.0, 3.0 | [5066727](https://support.microsoft.com/kb/5066727) | +| .NET Framework 4.6.2 | [5066726](https://support.microsoft.com/kb/5066726) | + +The operating system rows list a KB that's used for update-offering purposes. When the operating system KB is offered, the applicability logic determines the specific .NET Framework updates that will be installed. Updates for individual .NET Framework versions are installed based on the version of .NET Framework that's already present on the device. Because of this, the operating system KB is not expected to be listed as an installed update on the device. The expected updates to be installed are the .NET Framework specific version updates listed in the preceding table. diff --git a/docs/framework/release-notes/release-notes.md b/docs/framework/release-notes/release-notes.md index 6491d8c404554..7769496a8b7b3 100644 --- a/docs/framework/release-notes/release-notes.md +++ b/docs/framework/release-notes/release-notes.md @@ -11,8 +11,9 @@ The .NET Framework updates include cumulative security and reliability improveme .NET Framework cumulative update releases are discussed in detail in the following individual release notes: -* October 14, 2025 - [cumulative update preview](./2025/10-14-october-cumulative-update.md) **New Release** -* September 9, 2025 - [cumulative update preview](./2025/09-09-september-cumulative-update.md) +* October 28 2025 - [cumulative update preview](./2025/10-28-october-cumulative-update-preview.md) **New Release** +* October 14, 2025 - [cumulative update](./2025/10-14-october-cumulative-update.md) +* September 9, 2025 - [cumulative update](./2025/09-09-september-cumulative-update.md) * August 26, 2025 - [cumulative update preview](./2025/08-26-august-cumulative-update-preview.md) * July 8, 2025 - [cumulative update](./2025/07-08-july-cumulative-update.md) * April 22, 2025 - [cumulative update preview](./2025/04-22-april-cumulative-update-preview.md) diff --git a/docs/framework/toc.yml b/docs/framework/toc.yml index a41f7ee6ac290..2212028c2615c 100644 --- a/docs/framework/toc.yml +++ b/docs/framework/toc.yml @@ -705,6 +705,8 @@ items: href: release-notes/2025/09-09-september-cumulative-update.md - name: October 2025 cumulative update href: release-notes/2025/10-14-october-cumulative-update.md + - name: October 2025 cumulative update preview + href: release-notes/2025/10-28-october-cumulative-update-preview.md - name: What's new href: whats-new/index.md - name: What's new in accessibility From 3cdcc6c3d49677938cebf5ac513dc19e8867ef65 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 08:25:48 -0700 Subject: [PATCH 2/7] Update docs/framework/release-notes/release-notes.md Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --- docs/framework/release-notes/release-notes.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/framework/release-notes/release-notes.md b/docs/framework/release-notes/release-notes.md index 7769496a8b7b3..423bda683ab52 100644 --- a/docs/framework/release-notes/release-notes.md +++ b/docs/framework/release-notes/release-notes.md @@ -11,7 +11,7 @@ The .NET Framework updates include cumulative security and reliability improveme .NET Framework cumulative update releases are discussed in detail in the following individual release notes: -* October 28 2025 - [cumulative update preview](./2025/10-28-october-cumulative-update-preview.md) **New Release** +* October 28, 2025 - [cumulative update preview](./2025/10-28-october-cumulative-update-preview.md) **New Release** * October 14, 2025 - [cumulative update](./2025/10-14-october-cumulative-update.md) * September 9, 2025 - [cumulative update](./2025/09-09-september-cumulative-update.md) * August 26, 2025 - [cumulative update preview](./2025/08-26-august-cumulative-update-preview.md) From ab188e6739682776815350f2726109e463f13260 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 08:26:23 -0700 Subject: [PATCH 3/7] Update docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --- .../2025/10-28-october-cumulative-update-preview.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md index 220281de0cac5..75745dd78ec73 100644 --- a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md +++ b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md @@ -1,11 +1,11 @@ --- title: October 2025 cumulative update description: Learn about the improvements in the .NET Framework October 2025 cumulative update. -ms.date: 10/14/2025 +ms.date: 10/28/2025 --- # October 2025 cumulative update -_Released October 14, 2025_ +_Released October 28, 2025_ ## Summary of what's new in this release From 6dee587ec809dda227524778096a3c0aca7ad6f8 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 08:26:45 -0700 Subject: [PATCH 4/7] Update docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --- .../2025/10-28-october-cumulative-update-preview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md index 75745dd78ec73..7e1e9efbd70db 100644 --- a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md +++ b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md @@ -16,7 +16,7 @@ _Released October 28, 2025_ #### CVE-2025-21176 – Remote Code Execution vulnerability -This security update addresses a remote code execution vulnerability detailed in [CVE 2025-21176](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176). +This security update addresses a remote code execution vulnerability detailed in [CVE-2025-21176](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176). ### Quality and reliability improvements From 553a70055756096400d12ad8320c2dd500c467f1 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 08:45:24 -0700 Subject: [PATCH 5/7] Update docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md Co-authored-by: Genevieve Warren <24882762+gewarren@users.noreply.github.com> --- .../2025/10-28-october-cumulative-update-preview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md index 7e1e9efbd70db..d2771ce6e814d 100644 --- a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md +++ b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md @@ -3,7 +3,7 @@ title: October 2025 cumulative update description: Learn about the improvements in the .NET Framework October 2025 cumulative update. ms.date: 10/28/2025 --- -# October 2025 cumulative update +# October 2025 cumulative update preview _Released October 28, 2025_ From f51bb16fa38fc908fab9b91af7ad99aeddd484a7 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 10:32:48 -0700 Subject: [PATCH 6/7] Update 10-28-october-cumulative-update-preview.md --- ...10-28-october-cumulative-update-preview.md | 83 +++---------------- 1 file changed, 12 insertions(+), 71 deletions(-) diff --git a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md index 220281de0cac5..f3ff58a2b59ae 100644 --- a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md +++ b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md @@ -1,11 +1,11 @@ --- -title: October 2025 cumulative update -description: Learn about the improvements in the .NET Framework October 2025 cumulative update. -ms.date: 10/14/2025 +title: October 2025 cumulative update preview +description: Learn about the improvements in the .NET Framework August 2025 cumulative update preview. +ms.date: 10/28/2025 --- -# October 2025 cumulative update +# October 2025 cumulative update preview -_Released October 14, 2025_ +_Released October 28, 2025_ ## Summary of what's new in this release @@ -14,13 +14,13 @@ _Released October 14, 2025_ ### Security improvements -#### CVE-2025-21176 – Remote Code Execution vulnerability - -This security update addresses a remote code execution vulnerability detailed in [CVE 2025-21176](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176). +There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements. ### Quality and reliability improvements -There are no new quality and reliability improvements in this update. +#### .NET Runtime + +Addresses an issue to update operating systeam calls for compliance with current standards. (*Applies to: .NET Framework 4.8.1*) ## Known issues in this release @@ -30,68 +30,9 @@ This release contains no known issues. The following table outlines the updates in this release. -| Product version | Cumulative update | +| Product version | Cumulative update preview | | --- | --- | | **Windows 11, version 25H2** | | -| .NET Framework 3.5, 4.8.1 | [5066128](https://support.microsoft.com/kb/5066128) | -| **Windows 11, version 24H2** | | -| .NET Framework 3.5, 4.8.1 | [5066131](https://support.microsoft.com/kb/5066131) | -| **Microsoft server operating system, version 24H2** | | -| .NET Framework 3.5, 4.8.1 | [5066131](https://support.microsoft.com/kb/5066131) | -| **Microsoft server operating system, version 23H2** | | -| .NET Framework 3.5, 4.8.1 | [5066129](https://support.microsoft.com/kb/5066129) | -| **Windows 11, version 22H2 and Windows 11, version 23H2** | | -| .NET Framework 3.5, 4.8.1 | [5066133](https://support.microsoft.com/kb/5066133) | -| **Microsoft server operating system, version 22H2** | **[5066743](https://support.microsoft.com/kb/5066743)** | -| .NET Framework 3.5, 4.8 | [5066139](https://support.microsoft.com/kb/5066139) | -| .NET Framework 3.5, 4.8.1 | [5066134](https://support.microsoft.com/kb/5066134) | -| **Microsoft server operating system, version 21H2** | **[5066743](https://support.microsoft.com/kb/5066743)** | -| .NET Framework 3.5, 4.8 | [5066139](https://support.microsoft.com/kb/5066139) | -| .NET Framework 3.5, 4.8.1 | [5066134](https://support.microsoft.com/kb/5066134) | -| **Windows 10, version 22H2** | **[5066747](https://support.microsoft.com/kb/5066747)** | -| .NET Framework 3.5, 4.8 | [5066135](https://support.microsoft.com/kb/5066135) | -| .NET Framework 3.5, 4.8.1 | [5066130](https://support.microsoft.com/kb/5066130) | -| **Windows 10, version 21H2** | **[5066746](https://support.microsoft.com/kb/5066746)** | -| .NET Framework 3.5, 4.8 | [5066135](https://support.microsoft.com/kb/5066135) | -| .NET Framework 3.5, 4.8.1 | [5066130](https://support.microsoft.com/kb/5066130) | -| **Windows 10 1809 and Windows Server 2019** | **[5066738](https://support.microsoft.com/kb/5066738)** | -| .NET Framework 3.5, 4.7.2 | [5066143](https://support.microsoft.com/kb/5066143) | -| .NET Framework 3.5, 4.8 | [5066137](https://support.microsoft.com/kb/5066137) | -| **Windows 10 1607 and Windows Server 2016** | | -| .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066836](https://support.microsoft.com/kb/5066836) | -| .NET Framework 4.8 | [5066136](https://support.microsoft.com/kb/5066136) | -| **Windows 10 1507** | | -| .NET Framework 3.5, 4.6, 4.6.2 | [5066837](https://support.microsoft.com/kb/5066837) | - -The following table is for earlier Windows and Windows Server versions for Security and Quality Rollup updates.   - -| Product version | Security and quality rollup | -| --- | --- | -| **Windows Server 2012 R2** | **[5066741](https://support.microsoft.com/kb/5066741)** | -| .NET Framework 3.5 | [5066151](https://support.microsoft.com/kb/5066151) | -| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066145](https://support.microsoft.com/kb/5066145) | -| .NET Framework 4.8 | [5066140](https://support.microsoft.com/kb/5066140) | -| **Windows Server 2012** | **[5066740](https://support.microsoft.com/kb/5066740)** | -| .NET Framework 3.5 | [5066148](https://support.microsoft.com/kb/5066148) | -| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066144](https://support.microsoft.com/kb/5066144) | -| .NET Framework 4.8 | [5066138](https://support.microsoft.com/kb/5066138) | -| **Windows Server 2008 R2** | **[5066739](https://support.microsoft.com/kb/5066739)** | -| .NET Framework 3.5.1 | [5066150](https://support.microsoft.com/kb/5066150) | -| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066146](https://support.microsoft.com/kb/5066146)| -| .NET Framework 4.8 |[5066141](https://support.microsoft.com/kb/5066141) | -| **Windows Server 2008** | **[5066742](https://support.microsoft.com/kb/5066742)** | -| .NET Framework 2.0, 3.0 | [5066149](https://support.microsoft.com/kb/5066149) | -| .NET Framework 3.5 SP1 | [5040673](https://support.microsoft.com/kb/5040673) | -| .NET Framework 4.6.2 | [5066146](https://support.microsoft.com/kb/5066146) | - -| Product version | Security Only Update | -| --- | --- | -| **Windows Server 2008 R2** | **[5066748](https://support.microsoft.com/kb/5066748)** | -| .NET Framework 3.5.1 | [5066728](https://support.microsoft.com/kb/5066728) | -| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | [5066726](https://support.microsoft.com/kb/5066726)| -| .NET Framework 4.8 |[5066725](https://support.microsoft.com/kb/5066725) | -| **Windows Server 2008** | **[5066749](https://support.microsoft.com/kb/5066749)** | -| .NET Framework 2.0, 3.0 | [5066727](https://support.microsoft.com/kb/5066727) | -| .NET Framework 4.6.2 | [5066726](https://support.microsoft.com/kb/5066726) | +| .NET Framework 3.5, 4.8.1 | [5067931](https://support.microsoft.com/kb/5067931) | -The operating system rows list a KB that's used for update-offering purposes. When the operating system KB is offered, the applicability logic determines the specific .NET Framework updates that will be installed. Updates for individual .NET Framework versions are installed based on the version of .NET Framework that's already present on the device. Because of this, the operating system KB is not expected to be listed as an installed update on the device. The expected updates to be installed are the .NET Framework specific version updates listed in the preceding table. +The operating system row lists a KB that's used for update offering purposes. When the operating system KB is offered, the applicability logic determines the specific .NET Framework update(s) installed. Updates for individual .NET Framework versions are installed based on the version of .NET Framework that is already present on the device. Because of this, the operating system KB is not expected to be listed as installed updates on the device. The expected updates installed are the .NET Framework-specific version updates listed in the previous table. From 140c15c8efa3cb10fa743f4b8cdd4943aa340dab Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Tue, 28 Oct 2025 11:04:32 -0700 Subject: [PATCH 7/7] Revise October 2025 cumulative update to preview Updated the release notes to reflect the preview status and new release date. --- .../2025/10-28-october-cumulative-update-preview.md | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md index c91cdf88604ec..3f3b38c530813 100644 --- a/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md +++ b/docs/framework/release-notes/2025/10-28-october-cumulative-update-preview.md @@ -1,7 +1,7 @@ --- -title: October 2025 cumulative update -description: Learn about the improvements in the .NET Framework October 2025 cumulative update. -ms.date: 10/14/2025 +title: October 2025 cumulative update preview +description: Learn about the improvements in the .NET Framework October 2025 cumulative update preview. +ms.date: 10/28/2025 --- # October 2025 cumulative update preview @@ -14,9 +14,7 @@ _Released October 28, 2025_ ### Security improvements -#### CVE-2025-21176 – Remote Code Execution vulnerability - -This security update addresses a remote code execution vulnerability detailed in [CVE 2025-21176](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176). +There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements. ### Quality and reliability improvements