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CISA Urges Federal Agencies to Patch Critical Microsoft Exchange Vulnerability

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Source: BleepingComputer
CISA Urges Federal Agencies to Patch Critical Microsoft Exchange Vulnerability
Photo: BleepingComputer
TL;DR Summary

CISA has ordered all US federal agencies to urgently patch a critical Microsoft Exchange vulnerability (CVE-2025-53786) by Monday morning, which could allow attackers with admin access to compromise entire domains through hybrid Exchange configurations. Agencies must update their systems and switch to a dedicated hybrid app to prevent potential lateral movement into cloud environments, with non-government organizations also urged to follow suit.

Topics:top-news#cve-2025-53786#federal-agencies#hybrid-vulnerability#microsoft-exchange#security-patch#technology
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  1. CISA orders fed agencies to patch new Exchange flaw by Monday  BleepingComputer
  2. ED 25-02: Mitigate Microsoft Exchange Vulnerability  CISA (.gov)
  3. CISA directs agencies to mitigate ‘high-severity’ Microsoft vulnerability  Federal News Network
  4. CISA, Microsoft warn about new Microsoft Exchange server vulnerability  Cybersecurity Dive
  5. Organizations Warned of Vulnerability in Microsoft Exchange Hybrid Deployment  SecurityWeek

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