CVE-2009-1122
The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2009-1122- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2009-1122- Updated
- 2026-11-02
EUVDEUVD-2009-1123 No score
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.
- Record
EUVD-2009-1123- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c9gf-r7p8-qf28 No score
The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4...
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.
- Record
GHSA-c9gf-r7p8-qf28- Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Microsoft IIS 6.0 - WebDAV Remote Authentication Bypass (2) | 2009-05-26 |
| Metasploit | MS09-020 IIS6 WebDAV Unicode Auth Bypass Directory Scanner | |
| Metasploit | MS09-020 IIS6 WebDAV Unicode Authentication Bypass |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Metasploit, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-1122 is a high vulnerability (CVSS 7.5) in Microsoft Internet Information Services, published June 10, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 98.4%, the 99th percentile. No source names a fixed version.
References
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5861
securitytracker.com/id?1022358
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020
securityfocus.com/bid/35232
us-cert.gov/cas/techalerts/TA09-160A.html
vupen.com/english/advisories/2009/1539
attrition.org/pipermail/vim/2009-June/002192.html
nvd.nist.gov/vuln/detail/CVE-2009-1122
github.com/advisories/GHSA-c9gf-r7p8-qf28