# MA-1132.082024: MyCERT Advisory - Denial of Service Vulnerability in Cisco Unified CM

**Date:** 23 Aug 2024  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-1132.082024  
**Advisory ID:** MA-1132.082024

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**1.0 Introduction**
Recently, Cisco released security updates to address vulnerabilities in Cisco Unified Communications Manager (CUCM) that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
**2.0 Impact**
This vulnerability could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper handling of malformed SIP messages.
**3.0 Affected Products**
- Cisco Unified CM and Cisco Unified CM SME.
**4.0 Recommendations**
CyberSecurity Malaysia encourages users and administrators to review the following advisories and apply the necessary updates:
Kindly refer to the following URLs for more information: <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-kkHq43We>
For updates addressing lower severity vulnerabilities, see the [Cisco Security Advisories](https://sec.cloudapps.cisco.com/security/center/publicationListing.x) page.
Generally, CyberSecurity Malaysia advises the users of these devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact us through the following channels:
E-mail: cyber999[at]cybersecurity.my 
Phone: 1-300-88-2999 (monitored during business hours) 
Mobile: +60 19 2665850 (24x7 call incident reporting) 
Business Hours: Mon - Fri 08:30 -17:30 MYT 
Web: [https://www.mycert.org.my](https://www.mycert.org.my/)
**5.0    References**
- <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-kkHq43We>