CVE-1999-1559: Alcatel Omniswitch

Medium severity, CVSS 5.0. EPSS: 1.7% chance of exploitation in the next 30 days.

Xylan OmniSwitch before 3.2.6 allows remote attackers to bypass the login prompt via a CTRL-D (control d) character, which locks other users out of the switch because it only supports one session at a time.

Affected products

• Alcatel Omniswitch: up to and including 3.2.4

Published 1999-03-31. Last modified 2026-06-16.