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Microsoft Exchange Vulnerability Prompts Urgent Security Measures

1 min read
Source: CISA (.gov)
TL;DR

CISA has issued an emergency directive requiring federal agencies to mitigate a critical post-authentication vulnerability (CVE-2025-53786) in Microsoft Exchange hybrid environments by August 11, 2025, including assessing their systems, updating to the latest CUs, applying hotfixes, disconnecting end-of-life servers, and preparing for API transitions, with ongoing reporting and assistance from CISA.

Topics:businesscybersecurity#cisa#cybersecurity#emergency-directive#microsoft-exchange#patch#vulnerability
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  1. ED 25-02: Mitigate Microsoft Exchange Vulnerability  CISA (.gov)
  2. CISA directs agencies to mitigate ‘high-severity’ Microsoft vulnerability  Federal News Network
  3. Microsoft Discloses Exchange Server Flaw Enabling Silent Cloud Access in Hybrid Setups  The Hacker News
  4. Microsoft urges admins to plug severe Exchange security hole (CVE-2025-53786)  Help Net Security
  5. ‘High-severity’ Microsoft Exchange vulnerability disclosed on heels of Black Hat talk  Nextgov/FCW

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