CVE-2010-2840: Cisco Unified Presence Server

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

The Presence Engine (PE) service in Cisco Unified Presence 6.x before 6.0(7) and 7.x before 7.0(8) does not properly handle an erroneous Contact field in the header of a SIP SUBSCRIBE message, which allows remote attackers to cause a denial of service (process failure) via a malformed message, aka Bug ID CSCtd39629.

Affected products

• Cisco Unified Presence Server: version 6.0 only; version 6.0(2) only; version 6.0(3) only; version 6.0(4) only; version 6.0(5) only; version 6.0(6) only; …

Published 2010-08-26. Last modified 2026-06-16.