HIGH
Buffer overflow in the ism.dll ISAPI extension that implements HTR scripting in Internet Information Server (IIS) 4.0 and 5.0 allows attackers to cause a denial of service or execute arbitrary code via HTR requests with long variable names
Published Apr 2, 2003
7.5
HIGHCVSS 2.0
EPSS 33.64%
Description
Buffer overflow in the ism.dll ISAPI extension that implements HTR scripting in Internet Information Server (IIS) 4.0 and 5.0 allows attackers to cause a denial of service or execute arbitrary code via HTR requests with long variable names.
Affected products
No data.
OR
- 4.0
- 5.0
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.
33.64% 0.33643
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.33643
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 (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 33.64% (0.33643) | 98.34th | v5 (v2026.06.15) |
| Aug 17, 2026 | 33.64% (0.33643) | 98.24th | v5 (v2026.06.15) |
| Jul 29, 2026 | 26.05% (0.26054) | 97.78th | v5 (v2026.06.15) |
| Jul 26, 2026 | 17.55% (0.17553) | 96.82th | v5 (v2026.06.15) |
| Jul 12, 2026 | 26.05% (0.26054) | 97.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 33.64% (0.33643) | 98.16th | v5 (v2026.06.15) |
| Feb 12, 2026 | 69.49% (0.69488) | 98.61th | v4 (v2025.03.14) |
| Dec 28, 2025 | 67.64% (0.67642) | 98.51th | v4 (v2025.03.14) |
| Dec 27, 2025 | 43.30% (0.43295) | 97.39th | v4 (v2025.03.14) |
| Oct 28, 2025 | 67.64% (0.67642) | 98.50th | v4 (v2025.03.14) |
| Oct 27, 2025 | 43.30% (0.43295) | 97.36th | v4 (v2025.03.14) |
| Oct 1, 2025 | 67.64% (0.67642) | 98.54th | v4 (v2025.03.14) |
| Jul 30, 2025 | 43.30% (0.43295) | 97.39th | v4 (v2025.03.14) |
| Mar 30, 2025 | 67.64% (0.67642) | 98.46th | v4 (v2025.03.14) |
| Mar 29, 2025 | 53.09% (0.53091) | 97.04th | v4 (v2025.03.14) |
| Mar 19, 2025 | 67.64% (0.67642) | 98.43th | v4 (v2025.03.14) |
| Mar 17, 2025 | 72.21% (0.72211) | 98.67th | v4 (v2025.03.14) |
| Mar 2, 2025 | 22.94% (0.22936) | 96.63th | v3 (v2023.03.01) |
| Dec 17, 2024 | 30.47% (0.30467) | 96.94th | v3 (v2023.03.01) |
| Aug 10, 2024 | 37.70% (0.37700) | 97.26th | v3 (v2023.03.01) |
| Feb 8, 2024 | 34.45% (0.34451) | 96.94th | v3 (v2023.03.01) |
| Sep 11, 2023 | 9.04% (0.09035) | 93.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 10.63% (0.10625) | 94.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 23.77% (0.23774) | 96.72th | v2 (v2022.01.01) |
| Feb 4, 2022 | 23.77% (0.23774) | 94.83th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (11)
- http://marc.info/?l=bugtraq&m=101854087828265&w=2 mailing-listx_refsource_BUGTRAQ
- http://www.atstake.com/research/advisories/2002/a041002-1.txt vendor-advisoryx_refsource_ATSTAKE
- http://www.cert.org/advisories/CA-2002-09.html third-party-advisoryx_refsource_CERTUS Government Resource
- http://www.cisco.com/warp/public/707/Microsoft-IIS-vulnerabilities-MS02-018.shtml vendor-advisoryx_refsource_CISCO
- http://www.iss.net/security_center/static/8799.php vdb-entryx_refsource_XF
- http://www.kb.cert.org/vuls/id/363715 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.osvdb.org/3325 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/4474 vdb-entryx_refsource_BID
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-018 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A130 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A45 vdb-entrysignaturex_refsource_OVAL
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 2, 2003
Updated Aug 8, 2024
Reserved Feb 21, 2002
Link CVE-2002-0071
CISA Vulnrichment
Updated n/a