CVE-2011-0949: Cisco IOS XR

High severity, CVSS 7.8. EPSS: 1.2% chance of exploitation in the next 30 days.

Cisco IOS XR 3.6.x, 3.8.x before 3.8.3, and 3.9.x before 3.9.1 does not properly remove sshd_lock files from /tmp/, which allows remote attackers to cause a denial of service (disk consumption) by making many SSHv1 connections, aka Bug ID CSCtd64417.

Affected products

• Cisco IOS XR: version 3.6.0 only; version 3.6.1 only; version 3.6.2 only; version 3.6.3 only; version 3.8.0 only; version 3.8.1 only; …

Published 2011-05-31. Last modified 2026-06-16.