Cisco Unified Communications Manager prior 4.1%283%29sr4 denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability has been found in Cisco Unified Communications Manager (Unified Communication Software) and classified as critical. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to "tracking of network connections," aka Bug IDs CSCsq22534 and CSCsw52371.

The weakness was published 08/27/2009 with Cisco (Website). It is possible to read the advisory at This vulnerability is known as CVE-2009-2052. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.1%283%29sr4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (52815). Similar entries are available at 49677, 49676, 49674 and 49673.






CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
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Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Unified Communications Manager 4.1%283%29sr4


06/12/2009 🔍
08/18/2009 +67 days 🔍
08/27/2009 +9 days 🔍
08/27/2009 +0 days 🔍
09/01/2009 +5 days 🔍
10/14/2009 +43 days 🔍
03/18/2015 +1981 days 🔍
08/20/2021 +2347 days 🔍



Organization: Cisco
Status: Not defined

CVE: CVE-2009-2052 (🔍)
X-Force: 52815
Vulnerability Center: 23342 - [cisco-sa-20090826-cucm] Cisco CUCM Remote DoS Vulnerability via a Large TCP Connections, High
SecurityFocus: 36676 - Cisco Unified Presence Track Network Connection Denial of Service Vulnerability

See also: 🔍


Created: 03/18/2015 03:15 PM
Updated: 08/20/2021 02:51 PM
Changes: 03/18/2015 03:15 PM (50), 02/13/2017 10:34 AM (9), 08/20/2021 02:51 PM (3)
Complete: 🔍


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