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CVE-1999-1222

16
FAUCET Score

CVE-1999-1222 describes a denial-of-service vulnerability in Netbt.sys within Microsoft Windows NT 4.0. A malicious DNS server can crash the system by responding to a DNS hostname lookup with an IP address of 0.0.0.0. This vulnerability has a CVSS score of 5.0 (Medium), indicating it can be exploited remotely with low complexity, resulting in a partial availability impact. There is no evidence of active exploitation, nor are there any known public exploit tools like Metasploit or ExploitDB entries. Community discussion and media coverage for this CVE are absent, which is typical for a significant portion of older vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_nt:4.0:*:terminal_server:*:*:*:*:*

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
5.02%
Probability of exploitation in next 30 days
EPSS Percentile
91.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0502 is in the 88th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

exchange.xforce.ibmcloud.com / vulnerabilities/3893
support.microsoft.com / support/kb/articles/Q188/5/71.ASP
PatchVendor Advisory