VULNERABILITY INTELLIGENCE

CVE-1999-1150

CVSS score7.5 HIGH
EPSS probability1.35%
CISA KEVNot currently listed
Published1998-06-30
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

Primary references