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CVE-2000-1039

36
FAUCET Score

CVE-2000-1039, known as the "NAPTHA" vulnerability, describes a denial-of-service flaw affecting various TCP/IP stacks and network applications, including Microsoft Windows 95, 98, 98SE, ME, and NT. Attackers can exploit this by flooding a target with TCP connection attempts, completing the handshake without maintaining connection state on their end. The vulnerability has a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity and no authentication required, leading to a partial denial of service. Its FAUCET Risk Score is high at 94/100, despite the moderate CVSS. Currently, there is no known active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, which is typical for many older vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_95:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_98:*:gold:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_98se:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_me:*:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
45.83%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.4583 is in the 99th percentile among its peer group of 23,690 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

archives.neohapsis.com / archives/win2ksecadvice/2000-q4/0105.html
razor.bindview.com / publish/advisories/adv_NAPTHA.html
docs.microsoft.com / en-us/security-updates/securitybulletins/2000/ms00-091
cert.org / advisories/CA-2000-21.html
PatchThird Party AdvisoryUS Government Resource
securityfocus.com / bid/2022
ExploitPatchVendor Advisory