CVE-2009-2509

Name: CVE-2009-2509
Creator: NVD / NIST
Published: 2009-12-09T18:30:00.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 17.05%

Last modified Jun 16, 2026

CVE-2009-2509 is a vulnerability of currently unknown severity. 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.". EPSS estimates a 17.05% chance of exploitation in the next 30 days.

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."

Metrics

EPSS Probability

17.05%

96.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions	Update
Microsoft	Windows Server 2003	All versions	Sp2
Microsoft	Windows Server 2008	All versions	—

References

Timeline

Published: Dec 9, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-2509?

How severe is CVE-2009-2509?

Severity scoring for CVE-2009-2509 is pending analysis. The EPSS model estimates a 17.05% probability of exploitation in the next 30 days.

How do I fix CVE-2009-2509?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-2509?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST