$ cve CVE-2018-0171 JSON

CVE-2018-0171 KEV EXPLOIT

9.8

CRITICAL · CVSS 3.1 · EPSS 99.5% (pctl 100)

Patch first

On CISA KEV — known exploited in the wild, due 2022-05-03.

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.

Scoring

CVSS	9.8 (CRITICAL, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS	99.48% — more likely to be exploited than 100% of all CVEs
Weakness	CWE-20
On CISA KEV	yes — remediate by 2022-05-03
Public exploit	yes
Published	2018-03-28
Last modified	2026-06-17

CISA KEV

Name	Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
Added	2021-11-03
Due	2022-05-03
Vendor / product	Cisco / IOS and IOS XE
Ransomware use	none reported

Affected (1)

Vendor	Product
cisco	ios

Public exploits

Source	Title	Date
exploit-db	Cisco Smart Install - Crash (PoC)	2018-03-29

References

→ the Explorer · watch your stack · NVD