CVE-2018-0156

7.5 HIGH 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. 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.

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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:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://www.securityfocus.com/bid/103569
Source: psirt@cisco.com
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040596
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/103569
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040596
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-2018-0156
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

11 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
9.7%
93th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-03-17

Weaknesses (CWE)

Affected Vendors

cisco