HIGH
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
Published Jun 10, 2009
7.5
HIGHCVSS 2.0
EPSS 98.45%
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.
Affected products
No data.
AND
- 5.0
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
98.45% 0.98447
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.98447
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (50 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 98.45% (0.98447) | 99.92th | v5 (v2026.06.15) |
| Jul 29, 2026 | 98.16% (0.98161) | 99.91th | v5 (v2026.06.15) |
| Jul 26, 2026 | 94.49% (0.94486) | 99.84th | v5 (v2026.06.15) |
| Jun 15, 2026 | 98.45% (0.98447) | 99.91th | v5 (v2026.06.15) |
| Mar 4, 2026 | 92.34% (0.92339) | 99.72th | v4 (v2025.03.14) |
| Mar 1, 2026 | 90.56% (0.90562) | 99.61th | v4 (v2025.03.14) |
| Feb 4, 2026 | 92.34% (0.92339) | 99.72th | v4 (v2025.03.14) |
| Feb 1, 2026 | 90.56% (0.90562) | 99.60th | v4 (v2025.03.14) |
| Jan 4, 2026 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Jan 1, 2026 | 90.56% (0.90562) | 99.60th | v4 (v2025.03.14) |
| Dec 28, 2025 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Dec 27, 2025 | 91.01% (0.91010) | 99.61th | v4 (v2025.03.14) |
| Dec 4, 2025 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Dec 1, 2025 | 90.56% (0.90562) | 99.59th | v4 (v2025.03.14) |
| Nov 4, 2025 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Nov 1, 2025 | 90.56% (0.90562) | 99.59th | v4 (v2025.03.14) |
| Oct 28, 2025 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Oct 27, 2025 | 91.01% (0.91010) | 99.62th | v4 (v2025.03.14) |
| Oct 4, 2025 | 92.34% (0.92339) | 99.72th | v4 (v2025.03.14) |
| Sep 4, 2025 | 91.01% (0.91010) | 99.63th | v4 (v2025.03.14) |
| Sep 1, 2025 | 87.07% (0.87070) | 99.42th | v4 (v2025.03.14) |
| Aug 4, 2025 | 91.01% (0.91010) | 99.62th | v4 (v2025.03.14) |
| Aug 1, 2025 | 87.07% (0.87070) | 99.42th | v4 (v2025.03.14) |
| Jul 30, 2025 | 91.01% (0.91010) | 99.61th | v4 (v2025.03.14) |
| Jul 4, 2025 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Jul 1, 2025 | 90.56% (0.90562) | 99.59th | v4 (v2025.03.14) |
| Jun 4, 2025 | 92.34% (0.92339) | 99.71th | v4 (v2025.03.14) |
| Jun 1, 2025 | 89.75% (0.89750) | 99.55th | v4 (v2025.03.14) |
| May 4, 2025 | 92.34% (0.92339) | 99.70th | v4 (v2025.03.14) |
| May 1, 2025 | 89.75% (0.89750) | 99.53th | v4 (v2025.03.14) |
| Mar 17, 2025 | 92.34% (0.92339) | 99.72th | v4 (v2025.03.14) |
| Mar 1, 2025 | 21.16% (0.21164) | 96.50th | v3 (v2023.03.01) |
| Jan 24, 2025 | 16.12% (0.16123) | 95.98th | v3 (v2023.03.01) |
| Dec 19, 2024 | 21.16% (0.21164) | 96.41th | v3 (v2023.03.01) |
| Dec 17, 2024 | 27.19% (0.27191) | 96.79th | v3 (v2023.03.01) |
| Oct 7, 2024 | 8.52% (0.08522) | 94.59th | v3 (v2023.03.01) |
| Jul 30, 2024 | 10.90% (0.10904) | 95.17th | v3 (v2023.03.01) |
| Jun 23, 2024 | 9.87% (0.09866) | 94.87th | v3 (v2023.03.01) |
| May 17, 2024 | 11.58% (0.11578) | 95.25th | v3 (v2023.03.01) |
| Oct 28, 2023 | 8.52% (0.08522) | 93.73th | v3 (v2023.03.01) |
| Mar 16, 2023 | 11.58% (0.11578) | 94.33th | v3 (v2023.03.01) |
| Mar 7, 2023 | 8.52% (0.08522) | 93.40th | v3 (v2023.03.01) |
| Mar 6, 2023 | 16.86% (0.16864) | 96.19th | v2 (v2022.01.01) |
| Sep 10, 2022 | 16.86% (0.16864) | 95.99th | v2 (v2022.01.01) |
| Jul 18, 2022 | 20.08% (0.20084) | 96.22th | v2 (v2022.01.01) |
| Jul 17, 2022 | 1.32% (0.01319) | 70.15th | v2 (v2022.01.01) |
| May 5, 2022 | 20.08% (0.20084) | 96.12th | v2 (v2022.01.01) |
| Apr 1, 2022 | 21.60% (0.21599) | 96.28th | v2 (v2022.01.01) |
| Mar 1, 2022 | 21.60% (0.21599) | 94.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 33.43% (0.33429) | 96.61th | v2 (v2022.01.01) |
Weaknesses (1)
References (7)
- http://www.attrition.org/pipermail/vim/2009-June/002192.html mailing-listx_refsource_VIMThird Party Advisory
- http://www.securityfocus.com/bid/35232 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id?1022358 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.us-cert.gov/cas/techalerts/TA09-160A.html third-party-advisoryx_refsource_CERTThird Party AdvisoryUS Government Resource
- http://www.vupen.com/english/advisories/2009/1539 vdb-entryx_refsource_VUPENThird Party Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020 vendor-advisoryx_refsource_MSPatchVendor Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5861 vdb-entrysignaturex_refsource_OVALThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.attrition.org/pipermail/vim/2009-June/002192.html | mailing-listx_refsource_VIMThird Party Advisory | |
| http://www.securityfocus.com/bid/35232 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id?1022358 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://www.us-cert.gov/cas/techalerts/TA09-160A.html | third-party-advisoryx_refsource_CERTThird Party AdvisoryUS Government Resource | |
| http://www.vupen.com/english/advisories/2009/1539 | vdb-entryx_refsource_VUPENThird Party Advisory | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-020 | vendor-advisoryx_refsource_MSPatchVendor Advisory | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5861 | vdb-entrysignaturex_refsource_OVALThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Jun 10, 2009
Updated Aug 7, 2024
Reserved Mar 25, 2009
Link CVE-2009-1122
CISA Vulnrichment
Updated n/a