CVE-2009-2509
Active Directory Federation Services (ADFS) in Microsoft Windows Server 2003 SP2 and Server 2008...
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."
Exploit likelihood
What each source reports
NVD Score used
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."
- Record
CVE-2009-2509- CVSS 2.0
- 9.0 High
AV:N/AC:L/Au:S/C:C/I:C/A:C - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2009-2509- Updated
- 2026-11-02
EUVDEUVD-2009-2504 No score
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."
- Record
EUVD-2009-2504- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3v4w-v493-36w7 No score
Active Directory Federation Services (ADFS) in Microsoft Windows Server 2003 SP2 and Server 2008...
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."
- Record
GHSA-3v4w-v493-36w7- Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-2509 is a high vulnerability (CVSS 9.0) in Microsoft Windows Server 2003, published December 9, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 17.1%, the 97th percentile. No source names a fixed version.