Over 29,000 Microsoft Exchange servers remain unpatched against a critical vulnerability (CVE-2025-53786), risking complete domain compromise through privilege escalation. Federal agencies and organizations worldwide are urged to urgently patch affected systems to prevent potential exploitation. #CVE-2025-53786 #MicrosoftExchange #FederalCybersecurity
Keypoints
- Over 29,000 Exchange servers are still vulnerable to the high-severity CVE-2025-53786 flaw.
- The vulnerability allows attackers with admin access to escalate privileges within Microsoft cloud environments.
- Microsoft released a hotfix in April 2025, but many servers remain unpatched, increasing attack risk.
- CISA ordered federal agencies to mitigate the vulnerability by updating and disconnecting affected servers.
- Failure to patch could lead to complete domain compromise in hybrid cloud and on-premises setups.