CVE-2026-62886

This is a bug in .NET (the code framework many Windows tools and apps use). If someone already has local access and can interact with the system, the bug can let them gain much higher permissions than they should. Think of it like finding a hidden “reset to administrator” switch inside a toolchain—if the right part of the tool is loaded and someone is already on the machine, they can pull it.

This matters if you use .NET and Visual Studio 2022/2026 on Windows, especially on machines where code using the vulnerable .NET components gets loaded into memory. A successful attack requires a local user (not a remote internet attack) and requires user interaction, so it’s mainly a risk for developer workstations, build machines, or any system an attacker can get to locally. Reachability is limited to situations where the vulnerable .NET code is loaded into memory on a machine the attacker can access locally.

This should be treated as RED because the vulnerability can let an attacker go from local access to full control of the system, which is the kind of escalation that leads to real damage. Even though there’s no clear dated public exploitation report and no public exploit code on record, the patch is available and the risk is high for environments where developer machines can be reached by untrusted insiders or compromised accounts. Also note this is press-associated with Lazarus group activity.