Description
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Published: 2026-05-12
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 01 Jun 2026 19:00:00 +0000

Type Values Removed Values Added
Description Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Tue, 19 May 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft excel
Microsoft office
Microsoft office Long Term Servicing Channel
CPEs cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*
Vendors & Products Microsoft excel
Microsoft office
Microsoft office Long Term Servicing Channel

Wed, 13 May 2026 10:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 12 May 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft office Online Server
Vendors & Products Microsoft office Online Server

Tue, 12 May 2026 17:30:00 +0000

Type Values Removed Values Added
Description Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Title Microsoft Excel Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft excel 2016
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Microsoft office Macos 2021
Microsoft office Macos 2024
Weaknesses CWE-122
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:excel_2016:*:*:*:*:*:*:x86:*
cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:ltsc:*:*:*
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
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 excel 2016
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Microsoft office Macos 2021
Microsoft office Macos 2024
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft 365 Apps Excel Excel 2016 Office Office 2019 Office 2021 Office 2024 Office Long Term Servicing Channel Office Macos 2021 Office Macos 2024 Office Online Server
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-06-19T16:12:51.494Z

Reserved: 2026-04-11T23:06:15.614Z

Link: CVE-2026-40362

cve-icon Vulnrichment

Updated: 2026-05-13T09:58:59.562Z

cve-icon NVD

Status : Modified

Published: 2026-05-12T18:17:15.077

Modified: 2026-06-17T10:45:11.243

Link: CVE-2026-40362

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-01T21:45:22Z

Weaknesses