CVE-2026-114159 json
Visual Studio Remote Code Execution Vulnerability
published yesterday modified 17h ago also EUVD-2026-121982 , GHSA-3cgx-w6gm-fqrx
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
Patch / fix
- nuget Microsoft.NETCore.App.Runtime.win-x86 8.0.34, 9.0.23, 10.0.15, 11.0.0
- nuget Microsoft.NETCore.App.Runtime.win-x64 8.0.34, 9.0.23, 10.0.15, 11.0.0
- nuget Microsoft.NETCore.App.Runtime.win-arm64 8.0.34, 9.0.23, 10.0.15, 11.0.0
- Microsoft .NET 10.0 installed on Windows 10.0.15
- Microsoft .NET 11.0 installed on Windows 11.0.0
- Microsoft .NET 8.0 installed on Windows 8.0.34
- Microsoft .NET 9.0 installed on Windows 9.0.23
- Microsoft Microsoft Visual Studio 2026 version 18.11 18.11.4
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- yesterday
Exploit prediction
0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 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 |
| GitHub | 3.1 | 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 |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Microsoft.NETCore.App.Runtime.win-x86 | >=8.0.0, <8.0.34 >=9.0.0, <9.0.23 >=10.0.0, <10.0.15 >=11.0.0-preview.1, <11.0.0 |
8.0.34 9.0.23 10.0.15 11.0.0 |
| nuget | Microsoft.NETCore.App.Runtime.win-x64 | >=8.0.0, <8.0.34 >=9.0.0, <9.0.23 >=10.0.0, <10.0.15 >=11.0.0-preview.1, <11.0.0 |
8.0.34 9.0.23 10.0.15 11.0.0 |
| nuget | Microsoft.NETCore.App.Runtime.win-arm64 | >=8.0.0, <8.0.34 >=9.0.0, <9.0.23 >=10.0.0, <10.0.15 >=11.0.0-preview.1, <11.0.0 |
8.0.34 9.0.23 10.0.15 11.0.0 |
Affected products
- Microsoft .NET 10.0 installed on Windows
- Microsoft .NET 11.0 installed on Windows
- Microsoft .NET 8.0 installed on Windows
- Microsoft .NET 9.0 installed on Windows
- Microsoft Microsoft Visual Studio 2026 version 18.11
- Microsoft Microsoft Visual Studio 2026 version 18.12
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-114159
vendor-advisory, patch, web
-
github.com
/dotnet/runtime/security/advisories/GHSA-3cgx-w6gm-fqrx
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-114159
advisory
-
github.com
/dotnet/announcements/issues/521
web
-
github.com
/dotnet/runtime/issues/137296
web
-
github.com
/dotnet/core/blob/main/release-notes/10.0/10.0.15/10.0.15.md
web
-
github.com
/dotnet/core/blob/main/release-notes/11.0/11.0.0/11.0.0.md
web
-
github.com
/dotnet/core/blob/main/release-notes/8.0/8.0.34/8.0.34.md
web
-
github.com
/dotnet/core/blob/main/release-notes/9.0/9.0.23/9.0.23.md
web
-
github.com
/dotnet/core/releases/tag/v11.0.0
web
-
github.com
/dotnet/runtime
package
-
github.com
/dotnet/runtime/releases/tag/v10.0.15
web
-
github.com
/dotnet/runtime/releases/tag/v8.0.34
web
-
github.com
/dotnet/runtime/releases/tag/v9.0.23
web
Sources
- CVE List CVE-2026-114159
- GitHub Advisory GHSA-3cgx-w6gm-fqrx
- NVD CVE-2026-114159
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.