CVE-2026-21264
Microsoft Account Spoofing Vulnerability
- State
- Published
- Severity
- 9.3 Critical
- Published
- Jan 22, 2026
- Updated
- Jul 30, 2026
- Reserved
- Dec 11, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.3 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C | microsoft |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Microsoft AccountMicrosoft |
|
References
- Microsoft Account Spoofing Vulnerabilityvendor-advisorypatch
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