CVE-1999-1150 — HIGH severity vulnerability (Livingston Portmaster routers running ComOS use the same ini)
Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions.
| CVE ID | CVE-1999-1150 |
|---|---|
| Severity | HIGH |
| CVSS score | 7.5 |
| CVSS vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| CWE | NVD-CWE-Other |
| Status | Modified |
| Published | 1998-06-30 |
| Last modified | 2026-04-16 |
| Description | Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions. |
| Source | NIST National Vulnerability Database |
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