The Register: Microsoft, CISA warn yet another Exchange server bug can lead to ‘total domain compromise’

Aug 7, 2025

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Source URL: https://www.theregister.com/2025/08/07/microsoft_cisa_warn_yet_another/
Source: The Register
Title: Microsoft, CISA warn yet another Exchange server bug can lead to ‘total domain compromise’

Feedly Summary: No reported in-the-wild exploits…yet
Microsoft and the feds late Wednesday sounded the alarm on another high-severity bug in Exchange Server hybrid deployments that could allow attackers to escalate privileges from on-premises Exchange to the cloud.…

AI Summary and Description: Yes

Summary: The text alerts about a critical vulnerability in Microsoft Exchange Server hybrid deployments that poses a significant risk for privilege escalation from on-premises environments to cloud setups. This is crucial for security professionals as it underscores the importance of managing hybrid infrastructures.

Detailed Description: The text discusses a recently identified high-severity vulnerability affecting Microsoft Exchange Server when used in hybrid configurations. It highlights the potential risk of privilege escalation, which could enable attackers to gain unauthorized access from on-premises systems to cloud services.

– The vulnerability has been acknowledged by both Microsoft and federal security agencies, indicating its severe implications.
– It demonstrates the need for vigilant monitoring and timely patching in hybrid cloud environments to prevent exploitation.
– Professionals managing hybrid infrastructures should prioritize vulnerability management strategies and incident response plans.
– The calling out of this vulnerability underscores the complexity and interdependencies inherent in hybrid cloud deployments, which can create security gaps if not properly managed.

The notification acts as a reminder that despite no known exploits in the wild currently, proactive security measures are essential to safeguard sensitive data and maintain compliance in increasingly interconnected environments.

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