CVE-2009-0085
HIGHEPSS 96th pctlDescription
The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008, when certificate authentication is used, does not properly validate the client's key exchange data in Transport Layer Security (TLS) handshake messages, which allows remote attackers to spoof authentication by crafting a TLS packet based on knowledge of the certificate but not the private key, aka "SChannel Spoofing Vulnerability."
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Very high risk: more likely to be exploited than 96% of all known CVEs.
References
- http://osvdb.org/52521
- http://secunia.com/advisories/34215
- http://www.securitytracker.com/id?1021828
- http://www.us-cert.gov/cas/techalerts/TA09-069A.html
- http://www.vupen.com/english/advisories/2009/0660
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-007
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6011
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.