CVE-2016-4842: Cybozu Mailwise

Medium severity, CVSS 4.3. EPSS: 1.6% chance of exploitation in the next 30 days.

Cybozu Mailwise before 5.4.0 allows remote attackers to obtain information on when an email is read.

Affected products

• Cybozu Mailwise: version 5.0.0 only; version 5.0.1 only; version 5.0.4 only; version 5.0.5 only; version 5.0.6 only; version 5.1.0 only; …

Published 2017-04-20. Last modified 2026-06-17.