A security researcher has released another zero-day exploit targeting Microsoft’s Windows operating system, shortly after Redmond rolled out its Patch Tuesday updates.

Dubbed RoguePlanet, the proof-of-concept (PoC) exploit was released by Nightmare Eclipse (also known as Chaotic Eclipse), who dropped several zero-days in Microsoft products over the past couple of months.

The fresh zero-day exploit leads to local privilege escalation (LPE) by exploiting a race condition issue in Microsoft Defender, Nightmare Eclipse says.

According to the researcher, the exploit initially led to remote code execution (RCE) by tricking a victim into opening a .vhd(x) file on a remote SMB server or into opening the SMB share.

The exploit could also lead to BitLocker bypass using a specialized device designed to push data to NTFS.sys. Once Defender reads the malicious file, the exploit would redirect the cleaned file to a new location.