CVE-2018-0171

9.8 CRITICAL CISA KEV - Actively Exploited
Published: March 28, 2018 Modified: October 28, 2025

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.securityfocus.com/bid/103538
Source: psirt@cisco.com
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040580
Source: psirt@cisco.com
Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
Source: psirt@cisco.com
Third Party Advisory US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
Source: psirt@cisco.com
Third Party Advisory US Government Resource
http://www.securityfocus.com/bid/103538
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040580
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0171
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

13 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
93.1%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-05-03

Weaknesses (CWE)

Affected Vendors

cisco