CVE-2015-6409: Cisco Jabber

Medium severity, CVSS 5.9. EPSS: 1.3% chance of exploitation in the next 30 days.

Cisco Jabber 10.6.x, 11.0.x, and 11.1.x on Windows allows man-in-the-middle attackers to conduct STARTTLS downgrade attacks and trigger cleartext XMPP sessions via unspecified vectors, aka Bug ID CSCuw87419.

Affected products

• Cisco Jabber: version 10.6(2) only

Published 2015-12-26. Last modified 2026-06-17.