What’s Vulnerable › Vulnerabilities

CVE-2015-6112

• Severity: medium (CVSS 5.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-11-11 · updated 2026-06-17
• Weakness: CWE-20

Description

SChannel in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 lacks the required extended master-secret binding support to ensure that a server's X.509 certificate is the same during renegotiation as it was before renegotiation, which allows man-in-the-middle attackers to obtain sensitive information or modify TLS session data via a "triple handshake attack," aka "Schannel TLS Triple Handshake Vulnerability."

Affected products

• Microsoft Windows 7: all versions
• Microsoft Windows 8: all versions
• Microsoft Windows 8.1: all versions
• Microsoft Windows Rt: all versions
• Microsoft Windows RT 8.1: all versions
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Vista: all versions

References

• http://www.securitytracker.com/id/1034124
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-121
• http://www.securitytracker.com/id/1034124
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-121

Get alerted when CVE-2015-6112 or the next vulnerability affects your stack