CVE-2026-55006 - Vulnerability Details - OpenCVE

Insufficient granularity of access control in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Microsoft	Exchange Server 2016 Exchange Server 2019 Exchange Server Se

No data.

No data.

No data.

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55006

History

Tue, 14 Jul 2026 18:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 14 Jul 2026 17:15:00 +0000

Type	Values Removed	Values Added
Description		Insufficient granularity of access control in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
Title		Microsoft Exchange Server Elevation of Privilege Vulnerability
First Time appeared		Microsoft Microsoft exchange Server 2016 Microsoft exchange Server 2019 Microsoft exchange Server Se
Weaknesses		CWE-1220
CPEs		cpe:2.3:a:microsoft:exchange_server_2016::cumulative_update_23::::::* cpe:2.3:a:microsoft:exchange_server_2019::cumulative_update_14::::::* cpe:2.3:a:microsoft:exchange_server_2019::cumulative_update_15::::::* cpe:2.3:a:microsoft:exchange_server_se::RTM::::::*
Vendors & Products		Microsoft Microsoft exchange Server 2016 Microsoft exchange Server 2019 Microsoft exchange Server Se
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55006
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}`

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-07-14T17:04:58.430Z

Updated: 2026-07-14T19:38:02.520Z

Reserved: 2026-06-16T14:10:05.870Z

Link: CVE-2026-55006

Vulnrichment

Updated: 2026-07-14T17:44:55.532Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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