Microsoft fixed CVE-2026-42824, a Microsoft 365 Copilot information-disclosure vulnerability disclosed in June 2026, after Varonis researchers described a one-click “SearchLeak” attack chain that abused Copilot Search, browser rendering behavior, and Microsoft service trust to leak enterprise...
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cve-2026-42824
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microsoft 365 copilot
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prompt injection
searchleakvulnerability