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Shai Leron

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Main Stage·32 min

DEF CON
Red Team
Date: Aug 2026
Location: Las Vegas

Identity Crisis - Novel Vulnerabilities leading to Kerberos Downgrade, DoS, and Full Domain Takeover

Shai Leron

Shows how invisible Unicode characters defeat uniqueness checks on Active Directory SPNs and UPNs, enabling Kerberos downgrade, denial of service and domain takeover.

vulnerability-researchkerberoswindows+2