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CVE-2026-21264— Microsoft Account Spoofing Vulnerability

CVSS 9.3 · Critical EPSS 0.05% · P16
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I. Basic Information for CVE-2026-21264

Vulnerability Information
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Vulnerability Title
Microsoft Account Spoofing Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Microsoft Account 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Account是美国微软（Microsoft）公司的一个账户服务。 Microsoft Account存在安全漏洞，该漏洞源于在网页生成过程中输入的中和不当。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

VendorProductAffected VersionsCPESubscribe
MicrosoftMicrosoft Account - -

II. Public POCs for CVE-2026-21264

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III. Intelligence Information for CVE-2026-21264

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Same Patch Batch · Microsoft · 2026-01-22 · 8 CVEs total

CVE-2026-243069.8 CRITICALAzure Front Door Elevation of Privilege Vulnerability
CVE-2026-243079.3 CRITICALM365 Copilot Information Disclosure Vulnerability
CVE-2026-243059.3 CRITICALAzure Entra ID Elevation of Privilege Vulnerability
CVE-2026-212278.2 HIGHAzure Logic Apps Elevation of Privilege Vulnerability
CVE-2026-215207.5 HIGHCopilot Studio Information Disclosure Vulnerability
CVE-2026-215217.4 HIGHWord Copilot Information Disclosure Vulnerability
CVE-2026-215247.4 HIGHAzure Data Explorer Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Account
Same vendor: Microsoft
Same weakness: CWE-79

V. Comments for CVE-2026-21264

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