CVE-2026-114158

Microsoft Security Advisory CVE-2026-114158 - Visual Studio Remote Code Execution Vulnerability

Products / packages Microsoft .NET 10.0 installed on Windows · Microsoft .NET 11.0 installed on Windows · Microsoft .NET 8.0 installed on Windows · 6 more

Published 10/11/2026, 18:19:17 UTC

Severity and exploitation

Not in CISA KEVSource: HIGH

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 22:55:31 UTC

OSV · CVSS:3.1 · 8.8

Assessment vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

microsoft · CVSS:3.1 · 8.8

Assessment vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

high8.8

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Package fixes recorded

Fix versions are recorded for 3 of 3 mapped packages. Check each release branch and any separate product guidance.

What this means

A vulnerability in .NET allows an out-of-bounds write when a Portable PDB 'EmbeddedSource' record with parent RID 0 is processed. Affected versions include .NET 8.0 to 11.0 on Windows.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

Exposure requires the PDB-reading operation described above; the presence of the reader does not make every application or symbol-reading path vulnerable.

Excerpt from the original source description below.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Microsoft · microsoft

.NET 10.0 installed on Windows

1 range

microsoft version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

10.0.0 → before 10.0.15

custom versions

Other versions: unknown

Microsoft · microsoft

.NET 11.0 installed on Windows

1 range

microsoft version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

11.0.0-preview.1 → before 11.0.0

custom versions

Other versions: unknown

Microsoft · microsoft

.NET 8.0 installed on Windows

1 range

microsoft version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

8.0.0 → before 8.0.34

custom versions

Other versions: unknown

Microsoft · microsoft

.NET 9.0 installed on Windows

1 range

microsoft version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

9.0.0 → before 9.0.23

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Visual Studio 2026 version 18.11

1 range

microsoft version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

18.11.0 → before 18.11.4

custom versions

Other versions: unknown

Microsoft · microsoft

Microsoft Visual Studio 2026 version 18.12

1 range

microsoft version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

18.12.0 → before 18.12.0

custom versions

Other versions: unknown

Packages

Compare each installed version with the publisher’s affected ranges. Where a fix is recorded, choose the appropriate release branch and test compatibility before upgrading.

Microsoft.NETCore.App.Runtime.win-x86 NuGet

Affected range	Recorded fix
From 8.0.0 before 8.0.34Ecosystem versions	8.0.34
From 9.0.0 before 9.0.23Ecosystem versions	9.0.23
From 10.0.0 before 10.0.15Ecosystem versions	10.0.15
From 11.0.0-preview.1 before 11.0.0Ecosystem versions	11.0.0

Version evidence: OSV · GHSA-r8h3-p8p6-ggp7

View original version evidence (71 explicit versions)

Microsoft.NETCore.App.Runtime.win-x64 NuGet

Affected range	Recorded fix
From 8.0.0 before 8.0.34Ecosystem versions	8.0.34
From 9.0.0 before 9.0.23Ecosystem versions	9.0.23
From 10.0.0 before 10.0.15Ecosystem versions	10.0.15
From 11.0.0-preview.1 before 11.0.0Ecosystem versions	11.0.0

Version evidence: OSV · GHSA-r8h3-p8p6-ggp7

View original version evidence (71 explicit versions)

Microsoft.NETCore.App.Runtime.win-arm64 NuGet

Affected range	Recorded fix
From 8.0.0 before 8.0.34Ecosystem versions	8.0.34
From 9.0.0 before 9.0.23Ecosystem versions	9.0.23
From 10.0.0 before 10.0.15Ecosystem versions	10.0.15
From 11.0.0-preview.1 before 11.0.0Ecosystem versions	11.0.0

Version evidence: OSV · GHSA-r8h3-p8p6-ggp7

View original version evidence (71 explicit versions)

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

Use the recorded fix for your release branch. Review the publisher’s instructions and test compatibility before upgrading.

Update each installed Windows SDK feature band:

Product	Affected version	Patched version
.NET SDK 8.0.1xx on Windows	>= 8.0.100-0, < 8.0.134	8.0.134
.NET SDK 8.0.4xx on Windows	>= 8.0.400-0, < 8.0.428	8.0.428
.NET SDK 9.0.1xx on Windows	>= 9.0.100-0, < 9.0.124	9.0.124
.NET SDK 9.0.3xx on Windows	>= 9.0.300-0, < 9.0.321	9.0.321
.NET SDK 10.0.1xx on Windows	>= 10.0.100-0, < 10.0.115	10.0.115
.NET SDK 10.0.4xx on Windows	>= 10.0.400-0, < 10.0.404	10.0.404
.NET SDK 11.0.1xx on Windows	>= 11.0.100-preview.1, < 11.0.100	11.0.100

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

OSV guidance ↗

Update affected .NET installations and each installed SDK feature band to the versions listed above or later.

OSV guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET. This advisory provides guidance on updating affected applications and components.

A Portable PDB EmbeddedSource record with parent RID 0 can trigger an out-of-bounds write.

CVSS Details

Version: 3.1
Severity: High
Score: 8.8 (base score)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Weakness: CWE-122

Affected Platforms

Platforms: Windows
Architectures: x86, x64, Arm64

<a name="affected-packages"></a>Affected Packages

Microsoft.DiaSymReader.Native components bundled with the affected .NET versions listed below are affected when initializing the native reader with a crafted Portable PDB containing an EmbeddedSource record with parent RID 0. The Windows runtime's native stack-trace reader can reach this initialization through its native-reader fallback.

.NET on Windows

Product	Affected version	Patched version
.NET 8.0 installed on Windows	>= 8.0.0, < 8.0.34	8.0.34
.NET 9.0 installed on Windows	>= 9.0.0, < 9.0.23	9.0.23
.NET 10.0 installed on Windows	>= 10.0.0, < 10.0.15	10.0.15
.NET 11.0 installed on Windows	>= 11.0.0-preview.1, < 11.0.0	11.0.0

Windows runtime packages for self-contained applications

The following packages deliver the affected .NET native reader. Exposure requires the PDB-reading operation described above; the presence of the reader does not make every application or symbol-reading path vulnerable.

Package	Affected version	Patched version
Microsoft.NETCore.App.Runtime.win-x86	>= 8.0.0, < 8.0.34	8.0.34
Microsoft.NETCore.App.Runtime.win-x64	>= 8.0.0, < 8.0.34	8.0.34
Microsoft.NETCore.App.Runtime.win-arm64	>= 8.0.0, < 8.0.34	8.0.34
Microsoft.NETCore.App.Runtime.win-x86	>= 9.0.0, < 9.0.23	9.0.23
Microsoft.NETCore.App.Runtime.win-x64	>= 9.0.0, < 9.0.23	9.0.23
Microsoft.NETCore.App.Runtime.win-arm64	>= 9.0.0, < 9.0.23	9.0.23
Microsoft.NETCore.App.Runtime.win-x86	>= 10.0.0, < 10.0.15	10.0.15
Microsoft.NETCore.App.Runtime.win-x64	>= 10.0.0, < 10.0.15	10.0.15
Microsoft.NETCore.App.Runtime.win-arm64	>= 10.0.0, < 10.0.15	10.0.15
Microsoft.NETCore.App.Runtime.win-x86	>= 11.0.0-preview.1, < 11.0.0	11.0.0
Microsoft.NETCore.App.Runtime.win-x64	>= 11.0.0-preview.1, < 11.0.0	11.0.0
Microsoft.NETCore.App.Runtime.win-arm64	>= 11.0.0-preview.1, < 11.0.0	11.0.0

Windows SDK updates

The following SDK updates include the corrected .NET runtime. Update each installed Windows SDK feature band:

Product	Affected version	Patched version
.NET SDK 8.0.1xx on Windows	>= 8.0.100-0, < 8.0.134	8.0.134
.NET SDK 8.0.4xx on Windows	>= 8.0.400-0, < 8.0.428	8.0.428
.NET SDK 9.0.1xx on Windows	>= 9.0.100-0, < 9.0.124	9.0.124
.NET SDK 9.0.3xx on Windows	>= 9.0.300-0, < 9.0.321	9.0.321
.NET SDK 10.0.1xx on Windows	>= 10.0.100-0, < 10.0.115	10.0.115
.NET SDK 10.0.4xx on Windows	>= 10.0.400-0, < 10.0.404	10.0.404
.NET SDK 11.0.1xx on Windows	>= 11.0.100-preview.1, < 11.0.100	11.0.100

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

Applications using Microsoft.DiaSymReader.Native components bundled with the affected .NET versions listed above to initialize the native reader with a crafted Portable PDB containing an EmbeddedSource record with parent RID 0 are exposed on x86, x64, and Arm64. The Windows runtime's native stack-trace reader can reach this initialization when PE metadata selects its native-reader fallback. See [affected packages](#affected-packages) for the affected .NET products on Windows.

<a name="how-fix"></a>How do I fix the issue?

Update affected .NET installations and each installed SDK feature band to the versions listed above or later. If an SDK was installed through Visual Studio, update Visual Studio as well.

For applications that deploy their own .NET runtime, including self-contained applications, update the runtime used to build the application, rebuild, and redeploy. Updating a machine-wide runtime does not replace an application's embedded runtime. Restart processes that have loaded the affected native reader.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/520

Other Information

Reporting Security Issues

If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the MSRC Researcher Portal. Further information can be found in the MSRC Report an Issue FAQ.

Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.

Support

You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.

Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

External Links

CVE-2026-114158

Acknowledgements

h4urek with secsys lab

Revisions

V1.0 (November 10, 2026): Advisory published.

References

14 sources

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114158

Vendor advisorymicrosoft

dotnet/runtime · security/advisories/GHSA-r8h3-p8p6-ggp7

Security advisory

nvd.nist.gov/vuln/detail/CVE-2026-114158

Security advisory

dotnet/announcements · issues/520

Source reference

dotnet/runtime · issues/137295

Source reference

dotnet/core · 10.0.15.md

Release notes

View 8 more references

dotnet/core · 11.0.0.md

Release notes

dotnet/core · 8.0.34.md

Release notes

dotnet/core · 9.0.23.md

Release notes

dotnet/core · releases/tag/v11.0.0

Release notes

dotnet/runtime · repository

Source reference

dotnet/runtime · releases/tag/v10.0.15

Release notes

dotnet/runtime · releases/tag/v8.0.34

Release notes

dotnet/runtime · releases/tag/v9.0.23

Release notes

Inside the record

Evidence available

Package identity

Version evidence

Remediation guidance · not supplied

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-114158

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-122 ↗

CWE-122: Heap-based Buffer Overflow

microsoft

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

microsoft · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:a:microsoft:.net_8.0_installed_on_windows:*:*:*:*:*:*:*:*

From (inclusive): 8.0.0

After:

Through (inclusive):

Before: 8.0.34

Vulnerable product

cpe:2.3:a:microsoft:.net_9.0_installed_on_windows:*:*:*:*:*:*:*:*

From (inclusive): 9.0.0

After:

Through (inclusive):

Before: 9.0.23

Vulnerable product

cpe:2.3:a:microsoft:.net_10.0_installed_on_windows:*:*:*:*:*:*:*:*

From (inclusive): 10.0.0

After:

Through (inclusive):

Before: 10.0.15

Vulnerable product

cpe:2.3:a:microsoft:.net_11.0_installed_on_windows:*:*:*:*:*:*:*:*

From (inclusive): 11.0.0-preview.1

After:

Through (inclusive):

Before: 11.0.0

Vulnerable product

cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.11:*:*:*:*:*:*:*:*

From (inclusive): 18.11.0

After:

Through (inclusive):

Before: 18.11.4

Vulnerable product

cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.12:*:*:*:*:*:*:*:*

From (inclusive): 18.12.0

After:

Through (inclusive):

Before: 18.12.0

Applicability preview

[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net_8.0_installed_on_windows:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "8.0.0",
            "versionEndExcluding": "8.0.34"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net_9.0_installed_on_windows:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "9.0.0",
            "versionEndExcluding": "9.0.23"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net_10.0_installed_on_windows:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "10.0.0",
            "versionEndExcluding": "10.0.15"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:.net_11.0_installed_on_windows:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "11.0.0-preview.1",
            "versionEndExcluding": "11.0.0"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.11:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "18.11.0",
            "versionEndExcluding": "18.11.4"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.12:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "18.12.0",
            "versionEndExcluding": "18.12.0"
          }
        ]
      }
    ]
  }
]

Contributing organizations · 2

microsoft

Assigning organization

2026-11-13

CISA-ADP

Additional data publisher

2026-11-10

Timeline

All times UTC

10 Nov 2026, 18:19
Advisory published
Publication date supplied by the source.
13 Nov 2026, 18:08
Source updated
Latest modification date supplied by the source.
13 Nov 2026, 19:15
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-10

Exploitation: none
Automatable: no
Technical Impact: total

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: GHSA-r8h3-p8p6-ggp7

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

OSV GHSA-r8h3-p8p6-ggp7 CVE CVE-2026-114158

Enrichment coverage

NVDAvailable

Checked 11/11/2026, 09:35:35 UTC

GHSAAvailable

Checked 11/11/2026, 09:35:36 UTC

EUVDAvailable

Checked 11/11/2026, 09:35:35 UTC

EPSSNo result

Checked 11/11/2026, 09:35:35 UTC

Additional source evidence

NVD · CVE-2026-114158

CVSS 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Checked 11/11/2026, 09:35:35 UTC

ENISA EUVD · EUVD-2026-121981

CVSS 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Checked 11/11/2026, 09:35:35 UTC

GitHub Advisory Database · GHSA-r8h3-p8p6-ggp7

CVSS 7.7 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Checked 11/11/2026, 09:35:36 UTC

Sponsored by MoxsoBuild security habits with adaptive training and phishing simulations.View as JSON

Microsoft Security Advisory CVE-2026-114158 - Visual Studio Remote Code Execution Vulnerability

Severity and exploitation

What this means

Attack conditions

Affected versions

.NET 10.0 installed on Windows

affected

unaffected

unknown

.NET 11.0 installed on Windows

affected

unaffected

unknown

.NET 8.0 installed on Windows

affected

unaffected

unknown

.NET 9.0 installed on Windows

affected

unaffected

unknown

Microsoft Visual Studio 2026 version 18.11

affected

unaffected

unknown

Microsoft Visual Studio 2026 version 18.12

affected

unaffected

unknown

Packages

What to do

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

Public exploit evidence

Original source description

Executive summary

CVSS Details

Affected Platforms

<a name="affected-packages"></a>Affected Packages

.NET on Windows

Windows runtime packages for self-contained applications

Windows SDK updates

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

<a name="how-fix"></a>How do I fix the issue?

Announcement

Other Information

Reporting Security Issues

Support

Disclaimer

External Links

Acknowledgements

Revisions

References

Inside the record

Evidence available

Original records

Underlying weaknesses

Environment requirements

Timeline

Advisory published

Source updated

Last imported by cve.new

What changed