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A critical Windows 11 and Windows 10 flaw turns Microsoft Defender into a hacker's best friend
Winsage
June 30, 2026

A critical Windows 11 and Windows 10 flaw turns Microsoft Defender into a hacker’s best friend

Chaotic Eclipse, also known as Nightmare-Eclipse, bypassed Windows 11's BitLocker security using a USB stick and claimed Microsoft left a backdoor in the system. Following this, Microsoft patched three zero-day exploits named YellowKey, GreenPlasma, and MiniPlasma. Nightmare-Eclipse then revealed another zero-day vulnerability called RoguePlanet, which affects Microsoft Defender on Windows 10 and 11, potentially allowing attackers full control over compromised systems. Microsoft is tracking this vulnerability as CVE-2026-50656 and is working on a security update. Nightmare-Eclipse provided a proof-of-concept exploit and described it as a race condition with variable success rates. Microsoft has promoted Windows Defender as adequate for most users but acknowledged that third-party tools can offer additional protection. The company initially threatened legal action against Nightmare-Eclipse but later decided not to pursue lawsuits against researchers sharing their findings.
A critical exploit bypasses Microsoft Defender in Windows 11 and Windows 10 — so much for "everyday risk protection without additional software"
Winsage
June 30, 2026

A critical exploit bypasses Microsoft Defender in Windows 11 and Windows 10 — so much for “everyday risk protection without additional software”

Security researcher Chaotic Eclipse, known as Nightmare-Eclipse, bypassed Windows 11's BitLocker security using a USB stick and claimed Microsoft intentionally included a backdoor in the feature. Microsoft responded by patching three zero-day exploits disclosed by Nightmare-Eclipse: YellowKey, GreenPlasma, and MiniPlasma, and is monitoring another exploit called RoguePlanet, cataloged as CVE-2026-50656. The RoguePlanet exploit is a race condition with varying success rates on different machines, achieving a 100% success rate on some devices. Microsoft acknowledged that while Windows 11's Defender is generally sufficient for most users, third-party tools can offer additional security features. Tensions between Nightmare-Eclipse and Microsoft have risen, with the company previously considering legal action but now indicating it will not pursue lawsuits against researchers sharing their findings.
Malware Has Gotten Smarter. Here's How Your Antivirus Has, Too
Tech Optimizer
June 21, 2026

Malware Has Gotten Smarter. Here’s How Your Antivirus Has, Too

Antivirus software is evolving from relying on static databases of known malware signatures to employing behavioral monitoring and machine learning for threat detection. Traditional antivirus solutions focused on recognizing known threats through unique signatures, but this approach has become inadequate due to the rapid evolution of malware, including polymorphic and metamorphic types. Modern antivirus systems now monitor program behavior, looking for suspicious activities such as unexpected file encryption or unusual network communication. Machine learning models analyze large datasets to identify patterns associated with malware, allowing for the classification of files as safe, potentially unwanted, or malicious. Techniques like sandboxing and dynamic analysis are used to preemptively neutralize threats. However, advancements in AI also present challenges, as cybercriminals can exploit these technologies to create sophisticated malware that evades detection. Despite improvements in antivirus effectiveness, modern cyberattacks increasingly target individuals through methods like phishing and social engineering, necessitating a combination of robust antivirus solutions and good cybersecurity practices.
Windows 11 update is breaking some PCs with boot and BitLocker issues
Winsage
June 16, 2026

Windows 11 update is breaking some PCs with boot and BitLocker issues

Windows 11 update KB5094126 (Build 26200.8655), released on June 9, 2026, has caused boot failures, blue screens, and BitLocker recovery prompts for users, particularly affecting business devices from HP and Dell, including models like HP EliteBook 840 G10 and Dell Precision 7530. The issues stem from changes in Secure Boot and EFI partition modifications, with insufficient EFI partition space leading to errors. A workaround involves disabling Secure Boot in BIOS. Additionally, users have reported disruptions with OneDrive and Microsoft Word integration, particularly in enterprise environments. Microsoft has not yet acknowledged these problems.
New Windows Zero‑Day Flaws Target Defender and BitLocker
Winsage
June 15, 2026

New Windows Zero‑Day Flaws Target Defender and BitLocker

A cybersecurity researcher known as “Nightmare Eclipse” has revealed two zero-day exploits threatening Windows systems: RoguePlanet and GreatXML. RoguePlanet targets Microsoft Defender, allowing attackers to execute privileged actions and gain SYSTEM-level access on Windows machines. It is a local privilege escalation vulnerability that remains effective on fully updated systems. GreatXML claims to bypass BitLocker disk encryption by manipulating the Windows Recovery Environment, potentially granting access to protected files. However, its effectiveness may be overstated, as it might require administrator-level access. Microsoft advises organizations to implement security updates, treat lost or accessible devices as high-risk, enforce stricter policies, and monitor threat intelligence to mitigate exposure to these vulnerabilities.
Microsoft's bug-hunting nemesis extends vendetta with more zero-day attacks — Nightmare Eclipse publishes RoguePlanet and GreatXML local privilege escalation exploits
Winsage
June 12, 2026

Microsoft’s bug-hunting nemesis extends vendetta with more zero-day attacks — Nightmare Eclipse publishes RoguePlanet and GreatXML local privilege escalation exploits

Nightmare-Eclipse, also known as Chaotic-Eclipse, has introduced two new exploits: RoguePlanet and GreatXML. RoguePlanet exploits a vulnerability in Windows Defender, allowing attackers to gain SYSTEM user access privileges by tricking a user into executing a script. This access enables attackers to execute commands beyond standard Administrator capabilities, siphon sensitive data, and install malware. GreatXML provides a method for bypassing BitLocker encryption by creating a specially crafted "unattend.xml" file and a "Recovery" directory on the Windows recovery partition. Microsoft has shifted its stance from threatening legal action against Eclipse and is now monitoring the situation, while Eclipse has postponed a planned mass disclosure of zero-day Windows vulnerabilities initially set for July 14 due to delays in developing RoguePlanet.
New GreatXML Exploit Bypasses Windows BitLocker via Recovery Partition XML Files
Winsage
June 11, 2026

New GreatXML Exploit Bypasses Windows BitLocker via Recovery Partition XML Files

Security researcher Chaotic Eclipse has released a Windows BitLocker bypass tool named GreatXML, following a previously disclosed exploit targeting Microsoft Defender. The discovery was made accidentally and took four hours. A critical vulnerability exists for users who have used the Windows Defender Offline Scan feature, making them susceptible to the BitLocker bypass. The exploit involves copying an XML file and a recovery folder to the recovery partition and rebooting into the Windows Recovery Environment (WinRE). If the Defender offline scan was not initiated, users must log in to start it or find a way to boot into WinRE in offline scan state. GreatXML is the second BitLocker bypass tool released by Chaotic Eclipse, following the earlier exploit known as YellowKey (CVE-2026-45585), which has been patched by Microsoft.
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