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CVE-1999-1132

21
FAUCET Score

CVE-1999-1132 describes a denial-of-service vulnerability affecting Microsoft Windows NT 4.0. Remote attackers can crash the system by sending specially crafted network traffic, specifically extra source routing data containing a Routing Information Field (RIF) with a hop count exceeding seven or a list with duplicate Token Ring IDs. This vulnerability has a CVSS score of 5.0 (Medium) due to its network-based attack vector, low attack complexity, and potential for partial availability impact. There is no evidence of active exploitation, nor is exploit code publicly available in common repositories like Metasploit or ExploitDB, and it has garnered no significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
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
18.30%
Probability of exploitation in next 30 days
EPSS Percentile
96.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1830 is in the 97th percentile among its peer group of 23,723 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

marc.info
marc.info
support.microsoft.com / support/kb/articles/Q179/1/57.asp
PatchVendor Advisory
iss.net / security_center/static/1399.php