CVE-2009-2435: IBM Lotus Instant Messaging And Web Conferencing

Medium severity, CVSS 5.0. EPSS: 1.1% chance of exploitation in the next 30 days.

The Sametime server in IBM Lotus Instant Messaging and Web Conferencing 6.5.1 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.

Affected products

• IBM Lotus Instant Messaging And Web Conferencing: version 6.5.1 only

Published 2009-07-13. Last modified 2026-06-16.