Critical severity9.3NVD Advisory· Published Jan 22, 2026· Updated Jun 17, 2026

CVE-2026-21264

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.

Affected products

Microsoft/Account3 versions
cpe:2.3:a:microsoft:account:-:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:microsoft:account:-:*:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: -

Patches

Vulnerability mechanics

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21264nvdVendor Advisory

News mentions

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ransomware	0.000