CVE-2026-21264

critical Microsoft
CVSS v3 Base Score
9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 87% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Published: January 22, 2026 (112 days ago)
Last Modified: February 3, 2026
Vendor: Microsoft

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.

CWE

CWE-79

Affected Products

microsoft account

References

🔗 msrc.microsoft.com