CVE-2009-1122

highpriority · attend · 74EPSS 0.984 · 100 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · functional

Likely / severe?

98.4% (100th) EPSS

CVSS 7.5 · high

Is it mine?

2 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:P/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimary

exploits (3)

Public proof-of-concept and weaponised exploit code.

EDB-8806Microsoft IIS 6.0 - WebDAV Remote Authentication Bypass (2)functional · exploit_db
auxiliary/scanner/http/dir_webdav_unicode_bypassMS09-020 IIS6 WebDAV Unicode Auth Bypass Directory Scannerfunctional · metasploit
auxiliary/scanner/http/ms09_020_webdav_unicode_bypassMS09-020 IIS6 WebDAV Unicode Authentication Bypassfunctional · metasploit

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet information services= 5.0nvdUScpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-06-10modified 2026-06-16

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+7709 more

references (14)

External citations — patches, advisories, analysis.

scry

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