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Vulnerability Details CVE-2026-21527

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 7.3%

CVSS Severity

CVSS v3 Score 6.5

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21527

Products affected by CVE-2026-21527

Microsoft » Exchange Server » Version: Any

cpe:2.3:a:microsoft:exchange_server:*
Microsoft » Exchange Server » Version: 2016

cpe:2.3:a:microsoft:exchange_server:2016
Microsoft » Exchange Server » Version: 2019

cpe:2.3:a:microsoft:exchange_server:2019

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Vulnerability Details CVE-2026-21527

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