CVEvulnerability

CVE-2018-0156

7.5 HIGH Known exploited Published 2018-03-28 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

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

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.

Added to KEV
2022-03-03
Remediation due
2022-03-17
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-0156
Status
Analyzed
Published
2018-03-28
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
7.8 HIGH — AV:N/AC:L/Au:N/C:N/I:N/A:C
Weaknesses
CWE-20, CWE-399

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.

Affected configurations

• cisco ios 15.2\(2\)e4 • cisco ios 15.2\(2a\)ja • cisco ios xe 15.2\(2\)e4 • cisco ios xe 15.2\(2a\)ja

Related

Weakness · not in database (1)

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References