Vulnerability Database

300,214

Total vulnerabilities in the database

CVE-1999-1150

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.

  • Published: Jun 30, 1998
  • Updated: Nov 9, 2025
  • CVE: CVE-1999-1150
  • Severity: High
  • Exploit:

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

No CWE or OWASP classifications available.

Software From Fixed in
livingston_portmaster / portmaster initial initial.x