CVE-2009-2509 in the critical feed json
Active Directory Federation Services (ADFS) in Microsoft Windows Server 2003 SP2 and Server 2008 Gold and SP2 does not properly validate he…
published 2009-12-09 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-2504
- cvss
- 9.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 17.1%
- EPSS 17.1% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
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 prediction
17.05% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2009/ms09-070
vendor-advisory
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6441
vdb-entry, signature
-
us-cert.gov
/cas/techalerts/TA09-342A.html
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2009-2509
- NVD CVE-2009-2509
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.