CVE-2000-1138: IBM Lotus Notes

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Lotus Notes R5 client R5.0.5 and earlier does not properly warn users when an S/MIME email message has been modified, which could allow an attacker to modify the email in transit without being detected.

Affected products

• IBM Lotus Notes: up to and including 5.0.5; version 5.0 only; version 5.0.1 only; version 5.0.2 only; version 5.0.3 only; version 5.0.4 only

Published 2001-01-09. Last modified 2026-06-16.