CVE-2026-69641

Microsoft Exchange Server Elevation of Privilege Vulnerability

State: Published
Severity: 9.1 Critical
Published: Sep 8, 2026
Updated: Oct 31, 2026
Reserved: Aug 3, 2026

Description

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
Microsoft Exchange Server 2016 Cumulative Update 23Microsoft	15.01.0.0 to before 15.01.2507.073Affected
Microsoft Exchange Server 2019 Cumulative Update 14Microsoft	15.02.0.0 to before 15.02.1544.046Affected
Microsoft Exchange Server 2019 Cumulative Update 15Microsoft	15.02.0.0 to before 15.02.1748.051Affected
Microsoft Exchange Server Subscription Edition RTMMicrosoft	15.02.0.0 to before 15.02.2562.049Affected

References

Microsoft Exchange Server Elevation of Privilege Vulnerabilityvendor-advisorypatch

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