Copilot Security
The latest Copilot Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
Microsoft Purview Now Lets Admins Choose Which AI Apps to Monitor for Risky Prompts
Microsoft has pushed a significant update to its Purview Insider Risk Management suite, giving security teams a long-requested capability: the power to select exactly which AI applications are...
CVE-2026-42824: Microsoft Shuts Down ‘SearchLeak’ Attack Chain in Copilot
Microsoft has rolled out a critical security update for Microsoft 365 Copilot that neutralizes a one-click data-exfiltration attack chain that researchers at Varonis dubbed “SearchLeak.” The...
Experts Warn Against Viral Microsoft Copilot Prompt Asking Users to Upload Bank Statements
A viral prompt instructing Microsoft Copilot users to upload their bank statements and credit card bills to “analyze spending habits” has exploded across TikTok, X, and Reddit this week. The...
CVE-2026-26136: Analyzing the Microsoft Security Update Guide Access Controversy
Microsoft's Security Update Guide has become the focal point of a significant controversy surrounding CVE-2026-26136, a vulnerability that has generated substantial discussion despite limited...
CVE-2026-26133: Microsoft's New "Confidence Signal" for Copilot Flaw Sparks Transparency Debate
Microsoft has documented CVE-2026-26133 as an information disclosure vulnerability affecting Microsoft 365 Copilot, but the company's sparse technical details and reliance on a "confidence signal"...
Enterprise AI governance frameworks now required as Microsoft Copilot adoption outpaces security controls in 2025
Since generative AI transitioned from experimental novelty to essential workplace utility, the central question for CIOs, CISOs, and business leaders has fundamentally shifted. The debate is no...
Microsoft Agents and Office Security: Navigating the New AI Productivity Frontier
Satya Nadella’s declaration that “SaaS will dissolve into a bunch of agents” has evolved from a provocative vision into Microsoft’s central strategic reality, fundamentally reshaping how...
Microsoft Purview DLP Now Blocks Copilot on Sensitive Files in Office Apps
Microsoft has significantly enhanced enterprise AI security by enabling Microsoft Purview's Data Loss Prevention (DLP) policies to block Microsoft 365 Copilot from processing sensitive files across...
Copilot Flaw CW1226324 Let AI Access Confidential Emails Despite DLP Policies
A significant security vulnerability in Microsoft Copilot for Microsoft 365, identified as CW1226324, has exposed a critical data loss prevention (DLP) bypass that allowed the AI assistant to read...
Enterprises Need Multi-Layered Defenses Against Copilot Runtime Data Leaks
Microsoft's Copilot rollout has delivered a leap in workplace productivity—and with it, a fresh class of security risk that is only visible when the assistant is actually running. Recent...
Windows 11 Default Browser: How EU DMA Forced Microsoft's One-Click Switch
Microsoft has fundamentally transformed the Windows 11 default browser experience, implementing a streamlined one-click switching mechanism that represents a significant departure from years of user...
AI Agent Identity Governance: The Critical Security Gap in Enterprise AI Adoption
As enterprises rapidly adopt AI copilots and autonomous agents, identity—not just models or data—has emerged as the primary attack surface requiring urgent governance. This revelation, sharpened...