CVE-2026-57091

This vulnerability is like a mistake in a built-in Windows feature (File History) that an attacker can exploit using limited access to “break out” into higher privileges. If that happens, the attacker can effectively control the whole computer as if they had admin-level power, without needing the user to click anything.

This matters if you use or manage Windows 10, Windows 11, or Windows Server 2016/2019/2022/2025, because the vulnerability is in a Windows service available on those systems. Exploitation requires an attacker to already have low-level access on the machine; it is not known to be reachable from a fully default, outside-the-network situation based on the provided information.

This is RED because it can be used locally by an attacker who already has low-level access to gain full control, and the fix is available. Even though it requires some initial access, successfully exploiting it is a fast path to turning a limited foothold into admin-level takeover.