race condition Archives

Tech Optimizer

July 11, 2026

Microsoft closes RoguePlanet vulnerability in Defender: SYSTEM privileges via the antivirus engine

A vulnerability known as RoguePlanet was identified in Microsoft Defender, tracked as CVE-2026-50656. This flaw allows local privilege escalation to the NT AUTHORITYSYSTEM account, requiring an attacker to have local code execution capabilities. It can be exploited through methods such as opening malicious email attachments. The vulnerability is categorized under CWE-59: “Improper Link Resolution Before File Access” and involves a race condition that affects the Defender engine's operations. RoguePlanet was disclosed by security researcher Nightmare-Eclipse on June 10, 2026, and confirmed by various security firms. Microsoft released a fix in version 1.1.26060.3008 of the Microsoft Malware Protection Engine, which should be installed automatically in standard Windows configurations. Users can verify their engine version using PowerShell. The vulnerability affects both Windows 10 and Windows 11 systems with the June 2026 security updates, and disabling real-time protection does not reliably mitigate it.

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.

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.

Winsage

June 30, 2026

Windows Defender ‘BlueHammer’ vulnerability now exploited as part of malware campaigns — CISA issues warning despite patch release on April 14

A race condition vulnerability in Windows Defender, known as BlueHammer, has been exploited by the hacker Nightmare Eclipse, allowing attackers to gain SYSTEM user access. Microsoft released a patch for this vulnerability on April 14, but the Cybersecurity and Infrastructure Security Agency (CISA) has flagged it as actively exploited in ransomware campaigns. The average time to apply critical OS patches across Windows 10 and 11 is now 127 days, with enterprise environments averaging 76 days. Estimates suggest that 15% to 26% of Windows 10 machines remain unpatched, with a conservative estimate of 20% translating to one in five machines being vulnerable. Microsoft has extended security updates for Windows 10 until October 14, 2027, but public awareness of the updates remains low.

Winsage

June 24, 2026

A bunch of bugs that broke PowerToys have been squashed

PowerToys has updated to version 0.100.1, fixing critical bugs from version 0.100.0 that affected core features. - Color Picker: Resolved a bug causing the main window to appear within the zoomed-in picker view. - Command Palette: Corrected initialization of Run history in Ahead-of-Time builds, fixed "???" display in Performance Monitor after restart, adjusted Hibernate command to use the Sleep icon, and limited "pin to dock" dialog to enabled displays. - Keyboard Manager: Addressed remapped modifier keys being delivered as system-key events. - Power Display: Fixed monitor power-state control not waking monitors from standby and resolved display detection and brightness control issues on dual-GPU laptops. - PowerToys Run: Improved discovery of Visual Studio Code workspaces. - Quick Access: Fixed crashes in the Quick Access flyout due to unhandled XAML exceptions. - Shortcut Guide: Resolved a crash in the sidebar navigation, corrected number-key rendering in shortcut manifests, and updated bundled manifests for consistent rendering. - ZoomIt: Fixed a race condition in audio initialization for video recording.

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.

Winsage

June 11, 2026

New Windows Zero-Day Exploit ‘RoguePlanet’ Released

A new zero-day exploit named RoguePlanet has been discovered targeting Microsoft’s Windows operating system, disclosed by security researcher Nightmare Eclipse. The exploit allows local privilege escalation (LPE) by exploiting a race condition in Microsoft Defender and can facilitate remote code execution (RCE) through deceptive .vhd(x) files. RoguePlanet may also bypass BitLocker encryption. The proof-of-concept has been tested on Windows 10 and Windows 11 systems but does not function on Windows Server, although the researcher believes all Windows Server versions are vulnerable. Following its release, RoguePlanet was confirmed by other researchers to spawn a command prompt with SYSTEM privileges on patched computers. This disclosure comes after Microsoft released patches for earlier exploits by Nightmare Eclipse, including GreenPlasma and YellowKey. The researcher has expressed dissatisfaction with Microsoft’s vulnerability disclosure process, alleging legal action against them and the suspension of their GitHub account, leading to the publication of RoguePlanet under a new account.

Winsage

June 11, 2026

Microsoft Patches Record 206 Flaws, Including Three Zero-Days and Critical RCE Bugs

Microsoft announced an update addressing 206 security vulnerabilities, including 39 classified as Critical and 167 as Important. The vulnerabilities include 63 privilege escalation, 56 remote code execution, 30 information disclosure, 27 spoofing, 20 security feature bypass, 7 denial-of-service, and 3 tampering vulnerabilities. Notable critical flaws include CVE-2026-45657 (use-after-free in Windows Kernel, CVSS score 9.8), CVE-2026-47291 (integer overflow in Windows HTTP.sys, CVSS score 9.8), and CVE-2026-44815 (stack-based buffer overflow in Windows DHCP Client, CVSS score 9.8). Microsoft also addressed vulnerabilities related to BitLocker bypass (CVE-2026-45585 and CVE-2026-50507) and introduced a new registry setting to mitigate risks associated with CVE-2026-49160 (denial-of-service vulnerability). The increase in patches is attributed to the use of artificial intelligence in vulnerability discovery, with the current year's reported vulnerabilities surpassing the total from all of 2018.

Winsage

June 10, 2026

Microsoft Defender RoguePlanet Zero-Day Grants SYSTEM Access on Updated Windows

An anonymous researcher known as Chaotic Eclipse has released a proof-of-concept exploit called RoguePlanet, targeting a zero-day vulnerability in Microsoft Defender. The exploit, which is a race condition, has a variable success rate, achieving 100% success on some machines while being less effective on others. When successful, it grants attackers SYSTEM-level privileges on Windows 10 and 11 systems with the June 2026 Patch Tuesday updates. The exploit does not work on Windows Server due to restrictions on mounting ISO images. Chaotic Eclipse has criticized Microsoft's defenses against path redirection attacks and claims to have found multiple vulnerabilities within Defender and other Microsoft software components. The researcher has expressed dissatisfaction with Microsoft's handling of vulnerability disclosures, particularly after losing access to the Microsoft Security Response Center account. Microsoft has condemned the public disclosure of vulnerabilities as unjustifiable, stating it puts customers at unnecessary risk, and has removed Chaotic Eclipse's GitHub and GitLab accounts. Microsoft clarified that it does not intend to pursue legal action against individuals conducting security research but will collaborate with law enforcement against malicious activities.

Winsage

May 18, 2026

MiniPlasma Windows 0-Day Enables SYSTEM Privilege Escalation on Fully Patched Systems

Chaotic Eclipse has unveiled a proof-of-concept (PoC) for a Windows privilege escalation zero-day vulnerability, codenamed MiniPlasma, which targets the "cldflt.sys" component and could grant SYSTEM privileges on fully patched Windows systems. This vulnerability was initially reported to Microsoft by James Forshaw from Google Project Zero in September 2020. Although Microsoft was believed to have resolved it in December 2020 as part of CVE-2020-17103, further analysis indicates that the flaw remains unaddressed. Chaotic Eclipse demonstrated that the original PoC could still spawn a SYSTEM shell reliably on his machines. The vulnerability is believed to affect all versions of Windows, with confirmation that MiniPlasma opens a "cmd.exe" prompt with SYSTEM privileges on Windows 11 systems with the latest May 2026 updates, though it does not function on the latest Insider Preview Canary version. In December 2025, Microsoft addressed a separate privilege escalation flaw in the same component, identified as CVE-2025-62221, which had a CVSS score of 7.8 and was reportedly being exploited by threat actors.