CVE-2025-29824

This Windows flaw is like a “use-after-free” mistake inside a system logging component. If someone has a valid local login, they can trigger the bug to gain higher privileges—eventually acting as the most powerful user on the machine. Because it has been used in ransomware-related activity, leaving it unpatched increases your risk of full compromise.

This matters if your business uses or administers any of these Windows versions: Windows Server 2008/2012/2012 R2/2008 R2/2016/2019/2022/2025 and Windows 10/11. The attack requires local access with valid user credentials, so it’s not a simple “internet hack”—it becomes a risk when an attacker can get a foothold and log in locally. KEV reporting indicates it has been used in ransomware campaigns, so treat it as urgent once a machine is reachable by an attacker who can obtain local credentials.

This is RED because CISA KEV confirms the issue was used in ransomware campaigns. Attackers only need to get local access with valid credentials, which is a common step after other compromises, so the window for exploitation is effectively “once they’re in.” Prioritize patching immediately to close the privilege-escalation path.