What’s Vulnerable › Vulnerabilities

CVE-2017-8495

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-07-11 · updated 2026-06-17
• Weakness: CWE-287

Description

Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an attacker to bypass Extended Protection for Authentication when Kerberos fails to prevent tampering with the SNAME field during ticket exchange, aka "Kerberos SNAME Security Feature Bypass Vulnerability" or Orpheus' Lyre.

Affected products

• Microsoft Windows 10 Version 1607: 1511, 1607, 1703
• Microsoft Windows 7: all versions
• Microsoft Windows 8.1: all versions
• Microsoft Windows RT 8.1: all versions
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: all versions

References

• http://www.securityfocus.com/bid/99424
• http://www.securitytracker.com/id/1038862
• https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495
• https://www.orpheus-lyre.info/
• http://www.securityfocus.com/bid/99424
• http://www.securitytracker.com/id/1038862
• https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495
• https://www.orpheus-lyre.info/

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