Unified Communications Manager
CVE-2019-1887
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
A vulnerability in the Session Initiation Protocol (SIP) protocol implementation of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of input SIP traffic. An attacker could exploit this vulnerability by sending a malformed SIP packet to an affected Cisco Unified Communications Manager. A successful exploit could allow the attacker to trigger a new registration process on all connected phones, temporarily disrupting service.
AnalysisAI
A vulnerability in the Session Initiation Protocol (SIP) protocol implementation of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Write vulnerability could allow attackers to write data beyond allocated buffer boundaries leading to code execution or crashes.
Technical ContextAI
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. A vulnerability in the Session Initiation Protocol (SIP) protocol implementation of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of input SIP traffic. An attacker could exploit this vulnerability by sending a malformed SIP packet to an affected Cisco Unified Communications Manager. A successful exploit could allow the attacker to trigger a new registration process on all connected phones, temporarily disrupting service. Affected products include: Cisco Unified Communications Manager.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
Directory traversal vulnerability in the Tomcat administrative web interface in Cisco Unified Communications Manager all
Cisco Unified Communications Manager and related products contain a code injection vulnerability (CVE-2026-20045) that a
The TFTP service in Cisco Unified Communications Manager (aka CUCM or Unified CM) allows remote attackers to obtain sens
Absolute path traversal vulnerability in the Real-Time Monitoring Tool (RTMT) API in Cisco Unified Communications Manage
A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating System softw
The encryption-processing feature in Cisco libSRTP before 1.5.3 allows remote attackers to cause a denial of service via
Buffer overflow in Cisco Unified Communications Manager (Unified CM) 7.1(x) before 7.1(5b)su6, 8.5(x) before 8.5(1)su6,
A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Ma
A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an unauthenti
A vulnerability in Cisco Unified Communications Manager 10.5(2.10000.5), 11.0(1.10000.10), and 11.5(1.10000.6) could all
The CTIManager module in Cisco Unified Communications Manager (CM) 10.0(1), when single sign-on is enabled, does not pro
A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM) and Cisco Uni
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today