CVE-2026-21264

critical

Description

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform spoofing over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21264

Details

Source: Mitre, NVD

Published: 2026-01-22

Updated: 2026-01-26

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 9.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Severity: Critical

EPSS

EPSS: 0.00065

Detections

Analytics