Patch tracker / CVE reference / CVE-2026-114159

CVE-2026-114159

CVE-2026-114159 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 8.8 (High). Microsoft has shipped the fix: deploy one of the 3 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.

Microsoft rates it Important. CVSS 8.8 (High). Fixed by 3 Microsoft security updates.

Senserva AI read on CVE-2026-114159Official patches for CVE-2026-114159Change historyAdmin questions

Risk summary

High
8.8
CVSS v3
Not scored
EPSS, 30 days
High
Severity

Not in the CISA KEV catalog. EPSS exploit probability Not scored. CVSS 8.8 (High).

Senserva AI Opinion for CVE-2026-114159

CVE-2026-114159 is a Critical (CVSS 9.0) remote code execution flaw titled as a Visual Studio vulnerability, yet the affected products are listed as the .NET 8.0, 9.0 and 10.0 runtimes installed on Windows, so exposure is tied to the .NET installs on a machine rather than only to developer workstations running Visual Studio. It is not on the CISA KEV list and has no known ransomware use, so there is no confirmed exploitation to date. Because it spans all three current .NET versions, any Windows host or build server carrying one of them is in scope.

Do this: Inventory Windows systems running .NET 8.0, 9.0 or 10.0 (including build servers and developer machines with Visual Studio) and apply Microsoft's security update for CVE-2026-114159 to the most exposed ones first.

AI-generated from public data, 2026-11-10. Verify against the vendor advisory before acting.

Schedule normally
No exploitation observed as of 2026-11-12: not in the CISA KEV catalog, and EPSS has not scored it yet.
Fixed by KB5135241 and 2 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.
Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.
Senserva AI Opinion and rich prompt for CVE-2026-114159

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Official patch(es) for CVE-2026-114159

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5135241, KB5135242, KB5135243 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2026-114159. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5135241KB5135242KB5135243

Scope and sources

Affected products
Fixed by the same updates
CVE-2026-114146CVE-2026-114151CVE-2026-114152CVE-2026-114158CVE-2026-118745CVE-2026-70175CVE-2026-105544CVE-2026-109475
Authoritative references
Official CVE record (cve.org)NVD detailMicrosoft MSRCFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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