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CVE-2026-114151VulnerabilityPublished

Microsoft.NETCore.App.Runtime.win x86: Microsoft Security Advisory CVE-2026-114151 - Visual Studio Remote Code

Affects Microsoft.NETCore.App.Runtime.win-x86Source GCVE Database

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Authoritative record:CVE-2026-114151· High 8.8

Not known to be exploited · CVSS 8.8 High : upgrade to 8.0.34 soon.

Data as of 11 Nov 2026, 01:21 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (microsoft)CVSS 3.18.8
Patch
Available – fixed in 8.0.34, 9.0.23, 10.0.15 +1
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
NuGetMicrosoft.NETCore.App.Runtime.win-x86Affected
  • >=8.0.0 <8.0.34
Fixed in
  • 8.0.34
NuGetMicrosoft.NETCore.App.Runtime.win-x64Affected
  • >=8.0.0 <8.0.34
Fixed in
  • 8.0.34
NuGetMicrosoft.NETCore.App.Runtime.win-arm64Affected
  • >=8.0.0 <8.0.34
Fixed in
  • 8.0.34
NuGetMicrosoft.NETCore.App.Runtime.win-x86Affected
  • >=9.0.0 <9.0.23
Fixed in
  • 9.0.23
NuGetMicrosoft.NETCore.App.Runtime.win-x64Affected
  • >=9.0.0 <9.0.23
Fixed in
  • 9.0.23
NuGetMicrosoft.NETCore.App.Runtime.win-arm64Affected
  • >=9.0.0 <9.0.23
Fixed in
  • 9.0.23

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the official patches by updating to the fixed versions: .NET 8.0.34 or later, 9.0.23 or later, 10.0.15 or later, and 11.0.0 or later. Also update each installed SDK feature band to the specified fixed versions or later. If the SDK was installed via Visual Studio, update Visual Studio as well. No other mitigation is required as the vulnerability is addressed by these updates.

Description

A high-severity vulnerability (CVE-2026-114151) exists in Microsoft.DiaSymReader.Native versions prior to 18.9.1-beta1.26515.1 used by certain .NET runtimes on Windows. The flaw involves an out-of-bounds stack write triggered by a crafted PDB LF_DECIMAL payload processed through ISymUnmanagedConstant.GetValue. This affects .NET runtime versions 8.0.0 up to but not including 8.0.34, 9.0.0 up to 9.0.23, 10.0.0 up to 10.0.15, and 11.0.0-preview.1 up to 11.0.0 on Windows x86, x64, and Arm64 architectures. The native stack-trace reading path in .NET does not invoke the vulnerable method, so not all .NET usage is affected. Patches are available in the specified fixed versions.

References

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