VULNERABILITY INTELLIGENCE

CVE-2018-0156

CVSS score7.5 HIGH
EPSS probability9.36%
CISA KEVKnown exploited vulnerability
Published2018-03-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Known Exploited Vulnerability

Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability

Vendor / product: Cisco / IOS Software and Cisco IOS XE Software

Description

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references