VULNERABILITY INTELLIGENCE

CVE-2022-20678

CVSS score8.6 HIGH
EPSS probability0.96%
CISA KEVNot currently listed
Published2022-04-15
Last modified2026-06-17
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 AppNav-XE feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of certain TCP segments. An attacker could exploit this vulnerability by sending a stream of crafted TCP traffic at a high rate through an interface of an affected device. That interface would need to have AppNav interception enabled. A successful exploit could allow the attacker to cause the device to reload.

Weakness classification

  • CWE-413: Improper Resource Locking
  • CWE-755: Improper Handling of Exceptional Conditions

Primary references