CVE-2026-21264

CRITICAL

9.3

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.

CVE Details

CVSS v3.1 Score9.3

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published1/22/2026

Last Modified2/3/2026

Sourcenvd

Honeypot Sightings0

Affected Products

microsoft:account

Weaknesses (CWE)

CWE-79

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21264(secure@microsoft.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.