CISA Issues Urgent Microsoft CVE-2025-53786 Security Warning

CISA directs agencies to mitigate ‘high-severity’ Microsoft vulnerability

The Cybersecurity and Infrastructure Security Agency is giving agencies through the weekend to patch a critical vulnerability in hybrid configurations of Microsoft’s widely used Exchange product. In an emergency directive issued early Thursday afternoon, CISA is giving agencies until 9 a.m. on Monday, Aug. 11, to mitigate the Microsoft Exchange vulnerability. “This vulnerability poses grave risk to all organizations operating Microsoft Exchange …

Microsoft Exchange bug can allow 'total domain compromise'

: No reported in-the-wild exploits…yet

CISA orders fed agencies to patch new Exchange flaw by Monday

CISA has issued an emergency directive ordering all Federal Civilian Executive Branch (FCEB) agencies to mitigate a critical Microsoft Exchange hybrid vulnerability tracked as CVE-2025-53786 by Monday morning at 9:00 AM ET.

CISA, Microsoft warn organizations of high-severity Microsoft Exchange vulnerability

LAS VEGAS — Federal cyber authorities issued an alert Wednesday evening about a high-severity vulnerability affecting on-premises Microsoft Exchange servers shortly after a researcher presented findings of the defect at Black Hat.  Microsoft also issued an advisory about the vulnerability — CVE-2025-53786 — and said it’s not aware of exploitation in the wild.  While the public disclosure and advisories about the defect came late in the day amid …

Microsoft urges users to be on alert following high-severity flaw in hybrid Exchange deployments

A bug allows crooks to move from on-prem to the cloud and wreak havoc.

CISA Issues Urgent Microsoft CVE-2025-53786 Security Warning

The US Cybersecurity and Infrastructure Security Agency has warned Microsoft users of a high-severity security vulnerability that requires immediate attention.