by Kastro
Paper/Archive/CVE-2026-21264

CVE-2026-21264

Microsoft Microsoft Account — Microsoft Account Spoofing Vulnerability

EPSS 0.4%CVSS 9.3
critical.is priorityof 100
35
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 35.5.355 × 207.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Microsoft Account-–CNA

Scores by source

microsoft (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-21264