CVE-2010-4687

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-01-07 · updated 2026-06-16
Weakness: CWE-20

Description

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

How to fix

Upgrade to a fixed version: Cisco IOS 15.0\(1\)xa1. Check the vendor advisory for mitigations.

References

http://www.cisco.com/en/US/docs/ios/15_0/15_0x/15_01_XA/rn800xa.pdf
http://www.securityfocus.com/bid/45769
https://exchange.xforce.ibmcloud.com/vulnerabilities/64584
http://www.cisco.com/en/US/docs/ios/15_0/15_0x/15_01_XA/rn800xa.pdf
http://www.securityfocus.com/bid/45769
https://exchange.xforce.ibmcloud.com/vulnerabilities/64584

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