CVE-2026-21260

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CVSS 3.1

7.5 high

EPSS

1%p72

Published

Feb 10, 2026 (Feb 10, 2026)

Modified

Jun 17, 2026

Description

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

Vendors: microsoft
Products: 365 apps, office, office long term servicing channel, outlook, sharepoint server
Weakness: CWE-200
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.5%)

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