Exposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

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Vendors Products
Microsoft Subscribe
365 Apps Subscribe
Office 2019 Subscribe
Office 2021 Subscribe
Office 2024 Subscribe
Office Long Term Servicing Channel Subscribe
Outlook Subscribe
Outlook 2016 Subscribe
Sharepoint Server Subscribe
Sharepoint Server 2016 Subscribe
Sharepoint Server 2019 Subscribe
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 11 Feb 2026 19:15:00 +0000

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

Wed, 11 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
Description Exposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Title Microsoft Outlook Spoofing Vulnerability
First Time appeared Microsoft
Microsoft 365 Apps
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Microsoft outlook 2016
Microsoft sharepoint Server
Microsoft sharepoint Server 2016
Microsoft sharepoint Server 2019
Weaknesses CWE-200
CPEs cpe:2.3:a:microsoft:365_apps:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:office_2019:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_2021:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:office_2024:*:*:*:*:long_term_servicing_channel:*:*:*
cpe:2.3:a:microsoft:outlook_2016:*:*:*:*:*:x86:*:*
cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*
cpe:2.3:a:microsoft:sharepoint_server_2016:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:microsoft:sharepoint_server_2019:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft 365 Apps
Microsoft office 2019
Microsoft office 2021
Microsoft office 2024
Microsoft outlook 2016
Microsoft sharepoint Server
Microsoft sharepoint Server 2016
Microsoft sharepoint Server 2019
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-02-12T19:11:16.147Z

Reserved: 2025-12-11T21:02:05.737Z

Link: CVE-2026-21260

cve-icon Vulnrichment

Updated: 2026-02-11T15:27:28.976Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-10T18:16:27.947

Modified: 2026-02-11T19:10:20.090

Link: CVE-2026-21260

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-12T12:32:11Z

Weaknesses