CVE-2009-1122
HIGH · CVSS 7.5EPSS 98.4%EU EUVD
The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4 does not properly decode URLs, which allows remote attackers to bypass authentication, and possibly read or create files, via a crafted HTTP request, aka "IIS 5.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1535.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-287
- EPSS score
- 98.4% (100th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-1123)
- Published
- June 10, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-1123 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / internet information services
- microsoft / windows 2000
References
- http://www.attrition.org/pipermail/vim/2009-June/002192.html(Third Party Advisory)
- http://www.securityfocus.com/bid/35232(Third Party Advisory, VDB Entry)
- http://www.securitytracker.com/id?1022358(Third Party Advisory, VDB Entry)
- http://www.us-cert.gov/cas/techalerts/TA09-160A.html(Third Party Advisory, US Government Resource)
- http://www.vupen.com/english/advisories/2009/1539(Third Party Advisory)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020(Patch, Vendor Advisory)
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5861(Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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