CVE-2026-21260

Published Feb 10, 2026

Last updated 19 days ago

Overview

Description
Exposure of sensitive information to an unauthorized actor in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Source
secure@microsoft.com
NVD status
Analyzed
Products
365_apps, office, office_long_term_servicing_channel, outlook, sharepoint_server

Risk scores

CVSS 3.1

Type
Primary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-200

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.