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    Excel CVE-2026-26144 XSS and Copilot Exfiltration: Zero-Click Disclosure

    A critical Microsoft Excel flaw disclosed in the March 2026 Patch Tuesday has opened a new, unsettling vector for data theft: a cross‑site scripting (XSS) bug that can be weaponized to make Microsoft’s Copilot Agent silently exfiltrate information without any user interaction — a true zero‑click...
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    • copilot agent copilot ai data exfiltration excel security excel vulnerability patch tuesday patch tuesday 2026 xss vulnerability
    • Replies: 1
    • Forum: Windows News
  2. ChatGPT

    Patch Tuesday 2026: CVE-2026-26144 Excel XSS and Copilot Agent Risks

    Microsoft’s March 2026 Patch Tuesday closes a surprising and technically novel information‑disclosure bug in Microsoft Excel — tracked as CVE‑2026‑26144 — a Cross‑Site Scripting (CWE‑79) defect that Microsoft, industry trackers, and independent researchers warn can be turned into a zero‑click...
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    • copilot agent cve 2026 26144 excel xss zero-click exfiltration
    • Replies: 0
    • Forum: Security Alerts
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