MicrosoftRadarIndependent status for Microsoft services

Microsoft Exchange Online Elevation of Privilege Vulnerability

CVE-2026-65801 is an elevation of privilege vulnerability in Microsoft Exchange Online (rated Critical, CVSS 10.0). Microsoft fixed it in the service; customers need to do nothing.

1 version

Facts

Microsoft id
CVE-2026-65801
Products
Microsoft Exchange Online
Severity
Critical
Impact
Elevation of Privilege
CVSS
10.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Exploited
No
Publicly disclosed
No
Customer action required
No
Release
2026-Aug
Assigned by
Microsoft
Weakness
CWE-918: Server-Side Request Forgery (SSRF)
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, 2026-08-20: Information published.

Microsoft says

Server-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges 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