VULNERABILITY INTELLIGENCE

CVE-2018-0171

CVSS score9.8 CRITICAL
EPSS probability99.48%
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:H/I:H/A:H

Known Exploited Vulnerability

Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability

Vendor / product: Cisco / IOS and IOS XE

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, or to execute arbitrary code on an affected device. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted Smart Install message to an affected device on TCP port 4786. A successful exploit could allow the attacker to cause a buffer overflow on the affected device, which could have the following impacts: Triggering a reload of the device, Allowing the attacker to execute arbitrary code on the device, Causing an indefinite loop on the affected device that triggers a watchdog crash. Cisco Bug IDs: CSCvg76186.

Weakness classification

  • CWE-20: Improper Input Validation
  • CWE-787: Out-of-bounds Write

Primary references