Visual Studio: Remote Code Execution through deserialization of untrusted data
Summary
A deserialization flaw in Visual Studio allows an unauthorized remote attacker to execute code on an affected system. Per the CVSS vector, no privileges are needed, but a user must interact, so attacks would likely rely on a lure such as a crafted file or project opened in the IDE. The CNA record lists Visual Studio 2026 version 18.12 and .NET 8, 9, 10 and 11 previews on Windows. Exploitation is not known, and NVD analysis was still pending at publication.
Affected
- Microsoft Visual Studio 2026 version 18.12 (CNA record; the listed range is incomplete)
- Microsoft .NET 8.0 on Windows: 8.0.0 to before 8.0.34 (CNA record)
- Microsoft .NET 9.0 on Windows: 9.0.0 to before 9.0.23 (CNA record)
- Microsoft .NET 10.0 on Windows: 10.0.0 to before 10.0.15 (CNA record)
- Microsoft .NET 11.0 previews on Windows: 11.0.0-preview.1 to before 11.0.0 (CNA record)
Fixed in
- Unknown until Microsoft confirms fixed builds in the MSRC advisory.
- Microsoft released November 2026 servicing updates for .NET 8, 9 and 10, the likely patch route; not yet confirmed for this CVE.
Workaround
- None known.
Exploitation
- No known exploitation in the wild. CISA SSVC: exploitation none, not automatable.
- No public proof of concept found at the time of research.
Our recommendation
- Inventory Visual Studio 2026 and .NET 8, 9, 10 and 11 preview installations on developer workstations and build servers.
- Install the November 2026 .NET and Visual Studio updates once Microsoft confirms the fixed versions.
- Do not open untrusted project, solution or data files in Visual Studio until patched.
- Monitor the MSRC advisory and CISA KEV for changes.
Information from Microsoft (Patch Tuesday November 2026)
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center advisory msrc.microsoft.com
- Microsoft .NET blog: November 2026 servicing updates devblogs.microsoft.com
- Visual Studio 2026 release notes learn.microsoft.com
- CVE Record CVE-2026-114151 www.cve.org
- Strix CVE summary (secondary, CNA-sourced) www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 10 Nov 2026, 22:44.
Original description (NVD)
Deserialization of untrusted data in Visual Studio allows an unauthorized attacker to execute code over a network.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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