Microsoft Outlook: Critical flaw exploited by Russian actors

A vulnerability in Outlook Web Access allows JavaScript code execution via email display.

Published 6sem1 sourceImportantupdated 1sem

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Russian actors are exploiting this flaw to conduct targeted cyberattacks.

Microsoft has yet to release an official patch for this zero-day vulnerability.

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Auto-synthesis from 1 media source · identified on July 30, 2026