CVE-2010-4687: Cisco IOS

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

STCAPP (aka the SCCP telephony control application) on Cisco IOS before 15.0(1)XA1 does not properly handle multiple calls to a shared line, which allows remote attackers to cause a denial of service (port hang) by simultaneously ending two calls that were controlled by CallManager Express (CME), aka Bug ID CSCtd42552.

Affected products

• Cisco IOS: before 15.0\(1\)xa1 (fixed in 15.0\(1\)xa1)

Published 2011-01-07. Last modified 2026-06-16.