CVE-2009-1535

highpriority · attend · 74EPSS 0.981 · 100 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

4 exploits · functional

Likely / severe?

98.1% (100th) EPSS

CVSS 7.5 · high

Is it mine?

3 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) 5.1 and 6.0 allows remote attackers to bypass URI-based protection mechanisms, and list folders or read, create, or modify files, via a %c0%af (Unicode / character) at an arbitrary position in the URI, as demonstrated by inserting %c0%af into a "/protected/" initial pathname component to bypass the password protection on the protected\ folder, aka "IIS 5.1 and 6.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1122.

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 (4)

Public proof-of-concept and weaponised exploit code.

EDB-8704Microsoft IIS 6.0 - WebDAV Remote Authentication Bypass (1)functional · exploit_db
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 (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet information services= 5.1nvdUScpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*
microsoft internet information services= 6.0nvdUScpe: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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+7710 more

references (22)

External citations — patches, advisories, analysis.

scry

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