Multiple vulnerabilities in Microsoft Developer Tools

Description

Multiple vulnerabilities were found in Microsoft Developer Tools. Malicious users can exploit these vulnerabilities to execute arbitrary code, spoof user interface, bypass security restrictions, gain privileges.

Below is a complete list of vulnerabilities:

1. A remote code execution vulnerability in GitHub Copilot and Visual Studio can be exploited remotely to execute arbitrary code.
2. A spoofing vulnerability in .NET can be exploited remotely to spoof user interface.
3. An elevation of privilege vulnerability in GitHub Copilot and Visual Studio can be exploited remotely to gain privileges.
4. A remote code execution vulnerability in GitHub Copilot and Visual Studio Code can be exploited remotely to execute arbitrary code.
5. A security feature bypass vulnerability in GitHub Copilot and Visual Studio Code can be exploited remotely to bypass security restrictions.

Original advisories

• CVE-2026-21256

• CVE-2026-21218
• CVE-2026-21257
• CVE-2026-21523
• CVE-2026-21518

Exploitation

Related products

• Microsoft-Visual-Studio
• Microsoft-Windows
• .NET
• Visual-Studio-Code
• Microsoft-Visual-Studio-Code

CVE list

• CVE-2026-21218
  critical
• CVE-2026-21256
  critical
• CVE-2026-21257
  critical
• CVE-2026-21518
  critical
• CVE-2026-21523
  critical

KB list

• 5077862
• 5077863
• 5077864

Read more

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