Cisco Unified Communications Manager up to 8.5.0 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, which was classified as critical, was found in Cisco Unified Communications Manager up to 8.5.0 (Unified Communication Software). This affects an unknown part. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Unspecified vulnerability in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5)su2, 7.x before 7.1(5b)su2, 8.0 before 8.0(3), and 8.5 before 8.5(1) allows remote attackers to cause a denial of service (process failure) via a malformed SIP message, aka Bug ID CSCth39586.

The weakness was presented 05/03/2011 with Cisco (Website). The advisory is shared at This vulnerability is uniquely identified as CVE-2011-1605. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 43425 (Cisco Unified Communications Manager Multiple Vulnerabilities (cisco-sa-20110427-cucm)).

Upgrading to version 7.1%282a%29su1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (67123).








  • end of life (old version)

CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Denial of service
CWE: CWE-404

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Unified Communications Manager 7.1%282a%29su1


04/05/2011 🔍
04/27/2011 +22 days 🔍
04/27/2011 +0 days 🔍
05/03/2011 +6 days 🔍
05/03/2011 +0 days 🔍
05/03/2011 +0 days 🔍
03/23/2015 +1420 days 🔍
11/05/2021 +2419 days 🔍



Organization: Cisco
Status: Not defined

CVE: CVE-2011-1605 (🔍)
X-Force: 67123
Vulnerability Center: 31296 - [cisco-sa-20110427-cucm] Cisco CUCM Remote DoS via a Crafted SIP Message (CVE-2011-1605), High
SecurityFocus: 47610 - Cisco Unified Communications Manager SIP Message (CVE-2011-1605) Denial of Service Vulnerability
Secunia: 44331


Created: 03/23/2015 04:50 PM
Updated: 11/05/2021 09:19 PM
Changes: 03/23/2015 04:50 PM (52), 03/22/2017 09:33 AM (10), 11/05/2021 09:19 PM (4)
Complete: 🔍
Cache ID: 34:8A9:40


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