VULNERABILITY INTELLIGENCE

CVE-2020-3596

CVSS score5.9 MEDIUM
EPSS probability1.23%
CISA KEVNot currently listed
Published2020-10-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

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.

Weakness classification

  • psirt@cisco.com: CWE-789
  • nvd@nist.gov: CWE-670

Primary references