CVE-2026-45459 - Vulnerability Details - OpenCVE

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Vendors	Products
Microsoft	365 Apps Office 2024 Office 365 Office Macos 2021 Office Macos 2024

No data.

No data.

No data.

References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45459

History

Tue, 09 Jun 2026 17:15:00 +0000

Type	Values Removed	Values Added
Description		Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
Title		Microsoft Excel Security Feature Bypass Vulnerability
First Time appeared		Microsoft Microsoft 365 Apps Microsoft office 2024 Microsoft office 365 Microsoft office Macos 2021 Microsoft office Macos 2024
Weaknesses		CWE-693
CPEs		cpe:2.3:a:microsoft:365_apps:::::enterprise:::* cpe:2.3:a:microsoft:office_2024:::::long_term_servicing_channel:::* cpe:2.3:a:microsoft:office_365::::::macos::* cpe:2.3:a:microsoft:office_macos_2021::::::long_term_servicing_channel::* cpe:2.3:a:microsoft:office_macos_2024::::::long_term_servicing_channel::*
Vendors & Products		Microsoft Microsoft 365 Apps Microsoft office 2024 Microsoft office 365 Microsoft office Macos 2021 Microsoft office Macos 2024
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45459
Metrics		cvssV3_1 `{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C'}`

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-06-09T17:05:24.602Z

Updated: 2026-06-09T17:49:03.366Z

Reserved: 2026-05-12T16:06:43.097Z

Link: CVE-2026-45459

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-06-09T17:17:20.203

Modified: 2026-06-09T17:17:20.203

Link: CVE-2026-45459

Redhat

No data.

OpenCVE Enrichment

No data.

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