What’s Vulnerable › Vulnerabilities

CVE-2009-2509

• Severity: critical (CVSS 9.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 17.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-12-09 · updated 2026-06-16
• Weakness: CWE-20

Description

Active Directory Federation Services (ADFS) in Microsoft Windows Server 2003 SP2 and Server 2008 Gold and SP2 does not properly validate headers in HTTP requests, which allows remote authenticated users to execute arbitrary code via a crafted request to an IIS web server, aka "Remote Code Execution in ADFS Vulnerability."

Affected products

• Microsoft Windows Server 2003: all versions
• Microsoft Windows Server 2008: all versions

References

• http://www.us-cert.gov/cas/techalerts/TA09-342A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-070
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6441
• http://www.us-cert.gov/cas/techalerts/TA09-342A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-070
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6441

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