CVE-2009-1122

Name: CVE-2009-1122
Creator: NVD / NIST
Published: 2009-06-10T18:30:00.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 98.45%

Last modified Jun 16, 2026

CVE-2009-1122 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 98.45% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

98.45%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Microsoft	Internet Information Services	5.0

References

http://www.attrition.org/pipermail/vim/2009-June/002192.htmlThird Party Advisory
http://www.securityfocus.com/bid/35232Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022358Third Party Advisory, VDB Entry
http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlThird Party Advisory, US Government Resource
http://www.vupen.com/english/advisories/2009/1539Third Party Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5861Third Party Advisory
http://www.attrition.org/pipermail/vim/2009-June/002192.htmlThird Party Advisory
http://www.securityfocus.com/bid/35232Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022358Third Party Advisory, VDB Entry
http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlThird Party Advisory, US Government Resource
http://www.vupen.com/english/advisories/2009/1539Third Party Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5861Third Party Advisory

Timeline

Published: Jun 10, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-1122?

How severe is CVE-2009-1122?

Severity scoring for CVE-2009-1122 is pending analysis. The EPSS model estimates a 98.45% probability of exploitation in the next 30 days.

How do I fix CVE-2009-1122?

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-2009-1122?

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

Scan your code now

Source: NVD / NIST