CVE-2026-70179: ASP.NET Core Elevation of Privilege – Informational Update

Microsoft has issued an informational update for CVE-2026-70179, an elevation of privilege vulnerability affecting ASP.NET Core. The update does not introduce new fixes; it merely adds download and KB article links for Microsoft Visual Studio in the Security Updates table.

What Happened

The vulnerability, CVE-2026-70179, allows an attacker to gain elevated privileges within an ASP.NET Core application. Microsoft identified the flaw and released a patch, but the latest update is purely informational.

Impact

• ASP.NET Core applications running on affected versions may be susceptible to privilege escalation.
• The update does not modify the patched binaries; the security posture remains the same.
• Visual Studio users will find new download and KB article links for reference.

What to Do

• Verify that your ASP.NET Core runtime and SDK are on the latest patched versions.
• If you are still on an unpatched release, apply the appropriate update immediately.
• Review the updated KB article for any additional guidance or configuration recommendations.
• Ensure that your deployment environment follows the principle of least privilege and restricts access to the application’s underlying files and processes.

Additional Resources

Microsoft Security Update Guide: CVE-2026-70179