CVE-2011-3288: Cisco Unified Presence

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Cisco Unified Presence before 8.5(4) does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption, and process crash) via a crafted XML document containing a large number of nested entity references, aka Bug IDs CSCtq89842 and CSCtq88547, a similar issue to CVE-2003-1564.

Affected products

• Cisco Unified Presence: before 8.5\(4\) (fixed in 8.5\(4\))

Published 2011-10-06. Last modified 2026-06-16.