ShieldBreak Zero-Day PoC Claims Microsoft Defender Patch Bypass With SYSTEM Access

The security researcher going by the name Chaotic Eclipse aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse has released a proof-of-concept PoC for a new Microsoft zero-day called ShieldBreak. The vulnerability, rooted in Microsoft Defender for Windows, demonstrates a patch bypass for...

CVE-2026-61936

Missing authorization in Windows Defender Firewall Service allows an authorized attacker to bypass a security feature locally...

CVE-2026-54123

Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally...

CVE-2026-54123 Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability

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CVE-2026-54123

Microsoft Defender for Endpoint (Mac) contains a local information disclosure vulnerability (CVE-2026-54123). Attack vector: Local; Privileges Required: Low; User Interaction: None; Confidentiality Impact: High. CVSSv3.1 base score 5.5 (Medium). A fix is available via Microsoft’s update guidance;...

EUVD-2026-56418

Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally...

CVE-2026-54123

Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally...

CVE-2026-54123 Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability

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CVE-2026-61936

CVE-2026-61936 describes a local security bypass in the Windows Defender Firewall Service where missing authorization allows an authorized attacker to bypass a security feature locally. The NVD entry and CVE records corroborate this description. According to the provided metrics, the impact is hi...

EUVD-2026-56340

Missing authorization in Windows Defender Firewall Service allows an authorized attacker to bypass a security feature locally...

CVE-2026-61936 Windows Defender Firewall Service Security Feature Bypass Vulnerability

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CVE-2026-61936 Windows Defender Firewall Service Security Feature Bypass Vulnerability

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Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally...

Windows Defender Firewall Service Security Feature Bypass Vulnerability

Missing authorization in Windows Defender Firewall Service allows an authorized attacker to bypass a security feature locally...

KLA91212 Multiple vulnerability in Microsoft System Center

Multiple vulnerability was found in Microsoft System Center. Malicious users can exploit this vulnerability to bypass security restrictions, obtain sensitive information. Original advisories CVE-2026-54123 Exploitation Related products Windows-Defender CVE list CVE-2026-54123 unknown Solution...

SUSE CVE-2026-46415

The Caddy Defender plugin is a middleware for Caddy that allows users to block or manipulate requests based on the client's IP address. Prior to version 0.10.1, Caddy Defender used r.RemoteAddr when evaluating whether a request should be blocked. RemoteAddr is the address of the immediate peer...

​​​​What’s new in Microsoft Security: July 2026

Every organization needs security that protects end to end with the speed and scale of AI. Microsoft’s vision is simple: security should be ambient and autonomous, just like the AI it protects. As organizations scale AI and expand across environments, security teams need protection that covers...

Security Updates for Microsoft Malware Protection Engine (July 2026)

The Microsoft Malware Protection Engine installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities: - Integer underflow wrap or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally. CVE-2026-55011 - Integ...

CVE-2026-46415

The Caddy Defender plugin is a middleware for Caddy that allows users to block or manipulate requests based on the client's IP address. Prior to version 0.10.1, Caddy Defender used r.RemoteAddr when evaluating whether a request should be blocked. RemoteAddr is the address of the immediate peer...

CVE-2026-46415 Caddy Defender trusted proxy client IP bypass

The Caddy Defender plugin is a middleware for Caddy that allows users to block or manipulate requests based on the client's IP address. Prior to version 0.10.1, Caddy Defender used r.RemoteAddr when evaluating whether a request should be blocked. RemoteAddr is the address of the immediate peer...