VULNERABILITY INTELLIGENCE

CVE-2021-1501

CVSS score8.6 HIGH
EPSS probability1.35%
CISA KEVNot currently listed
Published2021-04-29
Last modified2026-08-11
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Description

A vulnerability in the SIP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.The vulnerability is due to a crash that occurs during a hash lookup for a SIP pinhole connection. An attacker could exploit this vulnerability by sending crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a crash and reload of the affected device.

Weakness classification

  • psirt@cisco.com: CWE-613
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references