Name: CVE-2026-21260: Exposure of Sensitive Information to an Unauthorized Actor
Creator: Rapid7
Published: 2026-02-10T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-21260, CVSS 7.5, EPSS 0.00048

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

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 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)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Microsoft Office	—	Download and install Microsoft KB5002839Upgrade to the latest version of Microsoft Office	Feb 10, 2026	Feb 10, 2026
Microsoft Sharepoint	—	Upgrade to the latest version of Microsoft SharePoint 2019Upgrade to the latest version of Microsoft SharePoint Subscription EditionUpgrade to the latest version of Microsoft SharePoint 2016	Feb 10, 2026	Feb 10, 2026

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CVSS Details

Covered by Rapid7

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