CVE-2020-3596
MEDIUMCisco Expressway and TelePresence VCS < 12.6.3 - Unauthenticated Denial of Service via SIP Traffic
Title source: llmDescription
A vulnerability in the Session Initiation Protocol (SIP) of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of incoming SIP traffic. An attacker could exploit this vulnerability by sending a series of SIP packets to an affected device. A successful exploit could allow the attacker to exhaust memory on an affected device, causing it to crash and leading to a DoS condition.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-vcs-dos-n6xxTMZB
Scores
CVSS v3
5.9
EPSS
0.0121
EPSS Percentile
64.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-670
CWE-789
Status
published
Products (2)
cisco/expressway
< x12.6.3
cisco/telepresence_video_communication_server
< x12.6.3
Published
Oct 08, 2020
Tracked Since
Feb 18, 2026