Various TCP/IP stacks and network applications allow remote attackers to cause a denial of service by flooding a target host with TCP connection attempts and completing the TCP/IP handshake without maintaining the connection state on the attacker host, aka the "NAPTHA" class of vulnerabilities
Published Dec 19, 2000
5.0
MEDIUMCVSS 2.0
EPSS 45.83%
Description
Various TCP/IP stacks and network applications allow remote attackers to cause a denial of service by flooding a target host with TCP connection attempts and completing the TCP/IP handshake without maintaining the connection state on the attacker host, aka the "NAPTHA" class of vulnerabilities. NOTE: this candidate may change significantly as the security community discusses the technical nature of NAPTHA and learns more about the affected applications. This candidate is at a higher level of abstraction than is typical for CVE.
Affected products
No data.
- n/a
- n/a
- n/a
- n/a
- 4.0
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.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (43 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 45.83% (0.45833) | 98.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 45.83% (0.45833) | 98.64th | v5 (v2026.06.15) |
| Mar 4, 2026 | 44.88% (0.44877) | 97.51th | v4 (v2025.03.14) |
| Mar 1, 2026 | 17.15% (0.17146) | 94.91th | v4 (v2025.03.14) |
| Feb 4, 2026 | 44.88% (0.44877) | 97.48th | v4 (v2025.03.14) |
| Feb 1, 2026 | 17.15% (0.17146) | 94.85th | v4 (v2025.03.14) |
| Jan 4, 2026 | 44.88% (0.44877) | 97.45th | v4 (v2025.03.14) |
| Jan 1, 2026 | 17.15% (0.17146) | 94.83th | v4 (v2025.03.14) |
| Dec 4, 2025 | 44.88% (0.44877) | 97.42th | v4 (v2025.03.14) |
| Dec 1, 2025 | 17.15% (0.17146) | 94.78th | v4 (v2025.03.14) |
| Nov 4, 2025 | 44.88% (0.44877) | 97.42th | v4 (v2025.03.14) |
| Nov 1, 2025 | 17.15% (0.17146) | 94.77th | v4 (v2025.03.14) |
| Oct 12, 2025 | 44.88% (0.44877) | 97.41th | v4 (v2025.03.14) |
| Oct 4, 2025 | 38.35% (0.38346) | 97.12th | v4 (v2025.03.14) |
| Oct 1, 2025 | 13.38% (0.13379) | 93.97th | v4 (v2025.03.14) |
| Sep 4, 2025 | 38.35% (0.38346) | 97.15th | v4 (v2025.03.14) |
| Sep 1, 2025 | 13.38% (0.13379) | 93.97th | v4 (v2025.03.14) |
| Aug 4, 2025 | 38.35% (0.38346) | 97.10th | v4 (v2025.03.14) |
| Aug 1, 2025 | 13.38% (0.13379) | 93.93th | v4 (v2025.03.14) |
| Jul 5, 2025 | 38.35% (0.38346) | 97.06th | v4 (v2025.03.14) |
| Jul 1, 2025 | 13.38% (0.13379) | 93.89th | v4 (v2025.03.14) |
| Jun 6, 2025 | 38.35% (0.38346) | 97.04th | v4 (v2025.03.14) |
| Jun 1, 2025 | 13.38% (0.13379) | 93.83th | v4 (v2025.03.14) |
| May 4, 2025 | 38.35% (0.38346) | 97.01th | v4 (v2025.03.14) |
| May 1, 2025 | 13.38% (0.13379) | 93.81th | v4 (v2025.03.14) |
| Apr 17, 2025 | 38.35% (0.38346) | 96.99th | v4 (v2025.03.14) |
| Apr 16, 2025 | 13.38% (0.13379) | 93.75th | v4 (v2025.03.14) |
| Apr 15, 2025 | 38.35% (0.38346) | 96.99th | v4 (v2025.03.14) |
| Apr 14, 2025 | 13.38% (0.13379) | 93.59th | v4 (v2025.03.14) |
| Apr 9, 2025 | 38.35% (0.38346) | 96.95th | v4 (v2025.03.14) |
| Apr 8, 2025 | 13.38% (0.13379) | 93.59th | v4 (v2025.03.14) |
| Apr 5, 2025 | 38.35% (0.38346) | 96.94th | v4 (v2025.03.14) |
| Apr 4, 2025 | 13.38% (0.13379) | 93.59th | v4 (v2025.03.14) |
| Mar 30, 2025 | 38.35% (0.38346) | 96.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 21.65% (0.21652) | 93.05th | v4 (v2025.03.14) |
| Mar 28, 2025 | 38.35% (0.38346) | 96.93th | v4 (v2025.03.14) |
| Mar 17, 2025 | 32.56% (0.32564) | 96.48th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.21% (0.01206) | 85.86th | v3 (v2023.03.01) |
| Apr 18, 2024 | 1.21% (0.01206) | 85.05th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.21% (0.01206) | 83.04th | v3 (v2023.03.01) |
| Mar 6, 2023 | 13.11% (0.13105) | 95.68th | v2 (v2022.01.01) |
| Apr 1, 2022 | 13.11% (0.13105) | 95.31th | v2 (v2022.01.01) |
| Feb 4, 2022 | 13.11% (0.13105) | 90.51th | v2 (v2022.01.01) |
No CWE recorded.
References (5)
- http://archives.neohapsis.com/archives/win2ksecadvice/2000-q4/0105.html mailing-listx_refsource_WIN2KSEC
- http://razor.bindview.com/publish/advisories/adv_NAPTHA.html vendor-advisoryx_refsource_BINDVIEW
- http://www.cert.org/advisories/CA-2000-21.html third-party-advisoryx_refsource_CERTPatchThird Party AdvisoryUS Government Resource
- http://www.securityfocus.com/bid/2022 vdb-entryx_refsource_BIDExploitPatchVendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-091 vendor-advisoryx_refsource_MS
| Link | Providers | Tags |
|---|---|---|
| http://archives.neohapsis.com/archives/win2ksecadvice/2000-q4/0105.html | mailing-listx_refsource_WIN2KSEC | |
| http://razor.bindview.com/publish/advisories/adv_NAPTHA.html | vendor-advisoryx_refsource_BINDVIEW | |
| http://www.cert.org/advisories/CA-2000-21.html | third-party-advisoryx_refsource_CERTPatchThird Party AdvisoryUS Government Resource | |
| http://www.securityfocus.com/bid/2022 | vdb-entryx_refsource_BIDExploitPatchVendor Advisory | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-091 | vendor-advisoryx_refsource_MS |
Change history (0)
No recorded changes yet.