CVE-2013-0013: Microsoft Windows 7

Medium severity, CVSS 5.8. EPSS: 6.4% chance of exploitation in the next 30 days.

The SSL provider component in Microsoft Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, Windows 7 Gold and SP1, Windows 8, Windows Server 2012, and Windows RT does not properly handle encrypted packets, which allows man-in-the-middle attackers to conduct SSLv2 downgrade attacks against (1) SSLv3 sessions or (2) TLS sessions by intercepting handshakes and injecting content, aka "Microsoft SSL Version 3 and TLS Protocol Security Feature Bypass Vulnerability."

Affected products

• Microsoft Windows 7: any version
• Microsoft Windows 8: affected versions not specified
• Microsoft Windows Rt: affected versions not specified
• Microsoft Windows Server 2008: any version
• Microsoft Windows Server 2012: affected versions not specified
• Microsoft Windows Vista: any version

Published 2013-01-09. Last modified 2026-06-16.