Ethical Hacking News
Microsoft has confirmed a RoguePlanet zero-day vulnerability (CVE-2026-50656) affecting its Defender security software, which could allow attackers to gain SYSTEM-level privileges and execute code with the highest permissions. A patch is currently under development.
Microsoft has confirmed a RoguePlanet zero-day vulnerability (CVE-2026-50656) in its Defender security software.The vulnerability allows privilege escalation, potentially granting attackers SYSTEM-level privileges.A security researcher known as Nightmare-Eclipse discovered the vulnerability and made proof-of-concept code publicly available.Microsoft is actively developing a security patch to address the flaw and has warned users of the potential risk.Keeping software up-to-date and staying informed about emerging threats is crucial in protecting systems from exploitation.
Microsoft has recently confirmed a RoguePlanet zero-day vulnerability (CVE-2026-50656) affecting its Defender security software, which is causing concern among users. The company has acknowledged the issue and is actively developing a security patch to address the flaw.
The RoguePlanet zero-day vulnerability allows privilege escalation through the Microsoft Malware Protection Engine, which can provide attackers with SYSTEM-level privileges, enabling them to execute code with the highest permissions. This means that even patched systems may still be vulnerable to exploitation.
Chaotic Eclipse, a security researcher also known as Nightmare-Eclipse, has been behind the discovery of this vulnerability. The researcher had previously disclosed several other zero-day vulnerabilities affecting Microsoft products, including BlueHammer, UnDefend, and RedSun.
The RoguePlanet exploit currently does not work on Windows Server because standard users cannot mount ISO images, although the researcher claims that the underlying vulnerability still affects server installations and only requires a different exploitation method. The researcher's proof-of-concept (PoC) code for the exploit has been made publicly available, which can be used by attackers to gain unauthorized access to systems.
Microsoft is working to provide a high-quality security update that addresses this vulnerability and protect affected systems. The company has stated that it is aware of the issue and is actively investigating its validity and potential applicability.
The RoguePlanet zero-day vulnerability highlights the importance of keeping software up-to-date and the need for vigilance in addressing emerging security threats. As new vulnerabilities are discovered, it is essential to stay informed and take proactive steps to protect systems from exploitation.
Related Information:
https://www.ethicalhackingnews.com/articles/RoguePlanet-Zero-Day-A-Growing-Concern-for-Microsoft-Defender-Users-ehn.shtml
https://securityaffairs.com/193830/security/microsoft-confirms-rogueplanet-zero-day-in-defender-patch-under-development.html
https://nvd.nist.gov/vuln/detail/CVE-2026-50656
https://www.cvedetails.com/cve/CVE-2026-50656/
Published: Thu Jun 18 05:49:52 2026 by llama3.2 3B Q4_K_M
