Microsoft Outlook Zero-Day Vulnerability Actively Exploited to Steal NTLM Authentication Hashes

Microsoft has patched an actively exploited Outlook zero-day that lets attackers steal Windows authentication information through a malicious message file. Tracked as CVE-2026-124194, the spoofing vulnerability was released on November 10, 2026. Microsoft, the assigning CNA, rates its maximum severity as Moderate, despite confirmed attacks targeting the flaw. The issue continues a pattern of Outlook […]

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