MicrosoftRadarIndependent status for Microsoft services

Microsoft Exchange Online Remote Code Execution Vulnerability

CVE-2026-96185 is a remote code execution vulnerability in Microsoft Exchange Online (rated Critical, CVSS 7.5). Microsoft fixed it in the service; customers need to do nothing.

1 version

Facts

Microsoft id
CVE-2026-96185
Products
Microsoft Exchange Online
Severity
Critical
Impact
Remote Code Execution
CVSS
7.5
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Exploited
No
Publicly disclosed
No
Customer action required
No
Release
2026-Oct
Assigned by
Microsoft
Weakness
CWE-121: Stack-based Buffer Overflow
MSRC revision
1.0
Status pages
Exchange Online status
First captured by us
(from our first import of this list)
Microsoft last modified
Source
Security updates · open the original at Microsoft

Microsoft's revision notes

  1. Revision 1.0, 2026-10-22: Information published.

Microsoft says

Stack-based buffer overflow in Microsoft Exchange Online allows an authorized attacker to execute code over a network.

Security updates,

Read Microsoft's full post

What Microsoft changed

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

  1. First version we captured ·

    The text as we first saw it

    Seen by us · Microsoft's timestamp · Microsoft's page

Other changes for Exchange Online