CVE-1999-1157 json
Tcpip.sys in Windows NT 4.0 before SP4 allows remote attackers to cause a denial of service via an ICMP Subnet Mask Address Request packet,…
published 1999-12-31 26 y ago modified 2026-06-16 4 mo ago also EUVD-1999-1138
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 13.3%
- EPSS 13.3% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
Tcpip.sys in Windows NT 4.0 before SP4 allows remote attackers to cause a denial of service via an ICMP Subnet Mask Address Request packet, when certain multiple IP addresses are bound to the same network interface.
Patch / fix
Exploit prediction
13.34% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
References
-
support.microsoft.com
/support/kb/articles/Q192/7/74.ASP
vendor-advisory, patch
-
exchange.xforce.ibmcloud.com
/vulnerabilities/3894
vdb-entry
Sources
- CVE List CVE-1999-1157
- NVD CVE-1999-1157
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.