What’s Vulnerable › Vulnerabilities

CVE-2010-2566

• Severity: critical (CVSS 9.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2010-08-11 · updated 2026-06-16
• Weakness: CWE-20

Description

The Secure Channel (aka SChannel) security package in Microsoft Windows XP SP2 and SP3, and Windows Server 2003 SP2, does not properly validate certificate request messages from TLS and SSL servers, which allows remote servers to execute arbitrary code via a crafted SSL response, aka "SChannel Malformed Certificate Request Remote Code Execution Vulnerability."

Affected products

• Microsoft Windows 2003 Server: all versions
• Microsoft Windows Server 2003: all versions
• Microsoft Windows XP Service Pack 3: all versions

References

• http://www.us-cert.gov/cas/techalerts/TA10-222A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-049
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11787
• http://www.us-cert.gov/cas/techalerts/TA10-222A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-049
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11787

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