CVE-2011-2561: n/a vulnerability

CVE-2011-2561: The SIP process in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 7.x before 7.1(5b)...

The SIP process in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 7.x before 7.1(5b)su4 and 8.x before 8.0(1) does not properly handle SDP data within a SIP call in certain situations related to use of the g729ar8 codec for a Media Termination Point (MTP), which allows remote attackers to cause a denial of service (service outage) via a crafted call, aka Bug ID CSCtc61990.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 00:11 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can let a remote caller crash or disrupt Cisco Unified Communications Manager call handling in affected legacy versions. The business impact is a voice service outage, not data theft. It matters most for organizations still running CUCM 7.x or early 8.x systems, especially where SIP traffic reaches the platform from less-trusted networks. Exposure is likely limited to legacy Cisco Unified Communications Manager deployments on the listed versions. Risk increases when SIP signaling is reachable from external trunks, partners, or untrusted internal segments. The supplied data does not identify broader Cisco products or currently supported releases as affected. Treat this as a targeted continuity risk for legacy voice infrastructure. If affected CUCM versions are still in production, prioritize remediation during the next voice maintenance window, faster for externally reachable SIP environments. It is not presented as a data compromise issue in the supplied sources. Mitigation focus: Inventory CUCM versions and identify affected 7.x or early 8.x systems.; Review Cisco advisory guidance for fixed releases and upgrade paths.; Prioritize migration from unsupported legacy CUCM where applicable..

Prepared: Jun 27, 2026, 18:09 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Aug 29, 2011, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

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