CVE-2026-114159: Visual Studio Remote Code Execution Vulnerability
CVE-2026-114159 is a remote code execution vulnerability in Visual Studio, rated Important by Microsoft, with a CVSS 3.1 base score of 8.8 (High). An attacker can exploit it remotely over the network, without any privileges and only if a user takes an action. Microsoft has not reported exploitation in the wild and rates exploitation as less likely. Microsoft released the fix on 10 November 2026 in the November 2026 Patch Tuesday, delivered through 3 security updates (KB5135243, KB5135242, KB5135241). It affects 6 products in 1 product family (Developer Tools).
Key facts
- CVE ID
- CVE-2026-114159
- Severity
- High CVSS 8.8
- Microsoft severity
- Important
- Impact
- Remote Code Execution
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- Less Likely
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- November 2026 Patch Tuesday
- Product families
- Developer Tools
CVSS score and vector
Microsoft scores CVE-2026-114159 at 8.8 (temporal 7.7) using CVSS 3.1. 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
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality impact | High |
| Integrity impact | High |
| Availability impact | High |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
Frequently asked questions (Microsoft)
According to the CVSS metric, the attack vector is network (AV:N) and user interaction is required (UI:R). What is the target context of the remote code execution?
This attack requires a user to open a specially crafted file from the attacker to initiate remote code execution.
Affected products (6)
Developer Tools
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| .NET 8.0 installed on Windows | KB5135243 | Security Update | 8.0.34 | |
| .NET 9.0 installed on Windows | KB5135242 | Security Update | 9.0.23 | |
| .NET 10.0 installed on Windows | KB5135241 | Security Update | 10.0.15 | |
| .NET 11.0 installed on Windows | Release Notes | Security Update | 11.0.0 | |
| Microsoft Visual Studio 2026 version 18.11 | Release Notes | Security Update | 18.11.4 | |
| Microsoft Visual Studio 2026 version 18.12 |
Security updates (3)
Acknowledgments
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |