Vulnerability Monitor

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CVE-2018-0156

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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 149 products from cisco, from cisco, from cisco and 146 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-03-28T22:29:00.467

Last Modified

2026-06-17T01:29:57.570

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-399
Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios	15.2\(2\)e4	Yes
Operating System	cisco	ios	15.2\(2a\)ja	Yes
Hardware	cisco	catalyst_2960-plus_24lc-l	-	No
Hardware	cisco	catalyst_2960-plus_24lc-s	-	No
Hardware	cisco	catalyst_2960-plus_24pc-l	-	No
Hardware	cisco	catalyst_2960-plus_24pc-s	-	No
Hardware	cisco	catalyst_2960-plus_24tc-l	-	No
Hardware	cisco	catalyst_2960-plus_24tc-s	-	No
Hardware	cisco	catalyst_2960-plus_48pst-l	-	No
Hardware	cisco	catalyst_2960-plus_48pst-s	-	No
Hardware	cisco	catalyst_2960-plus_48tc-l	-	No
Hardware	cisco	catalyst_2960-plus_48tc-s	-	No
Hardware	cisco	catalyst_2960c-12pc-l	-	No
Hardware	cisco	catalyst_2960c-8pc-l	-	No
Hardware	cisco	catalyst_2960c-8tc-l	-	No
Hardware	cisco	catalyst_2960c-8tc-s	-	No
Hardware	cisco	catalyst_2960cg-8tc-l	-	No
Hardware	cisco	catalyst_2960cpd-8pt-l	-	No
Hardware	cisco	catalyst_2960cpd-8tt-l	-	No
Hardware	cisco	catalyst_2960s-24pd-l	-	No
Hardware	cisco	catalyst_2960s-24ps-l	-	No
Hardware	cisco	catalyst_2960s-24td-l	-	No
Hardware	cisco	catalyst_2960s-24ts-l	-	No
Hardware	cisco	catalyst_2960s-24ts-s	-	No
Hardware	cisco	catalyst_2960s-48fpd-l	-	No
Hardware	cisco	catalyst_2960s-48fps-l	-	No
Hardware	cisco	catalyst_2960s-48lpd-l	-	No
Hardware	cisco	catalyst_2960s-48lps-l	-	No
Hardware	cisco	catalyst_2960s-48td-l	-	No
Hardware	cisco	catalyst_2960s-48ts-l	-	No
Hardware	cisco	catalyst_2960s-48ts-s	-	No
Hardware	cisco	catalyst_2960s-f24ps-l	-	No
Hardware	cisco	catalyst_2960s-f24ts-l	-	No
Hardware	cisco	catalyst_2960s-f24ts-s	-	No
Hardware	cisco	catalyst_2960s-f48fps-l	-	No
Hardware	cisco	catalyst_2960s-f48lps-l	-	No
Hardware	cisco	catalyst_2960s-f48ts-l	-	No
Hardware	cisco	catalyst_2960s-f48ts-s	-	No
Hardware	cisco	catalyst_2960x-24pd-l	-	No
Hardware	cisco	catalyst_2960x-24ps-l	-	No
Hardware	cisco	catalyst_2960x-24psq-l_cool	-	No
Hardware	cisco	catalyst_2960x-24td-l	-	No
Hardware	cisco	catalyst_2960x-24ts-l	-	No
Hardware	cisco	catalyst_2960x-24ts-ll	-	No
Hardware	cisco	catalyst_2960x-48fpd-l	-	No
Hardware	cisco	catalyst_2960x-48fps-l	-	No
Hardware	cisco	catalyst_2960x-48lpd-l	-	No
Hardware	cisco	catalyst_2960x-48lps-l	-	No
Hardware	cisco	catalyst_2960x-48td-l	-	No
Hardware	cisco	catalyst_2960x-48ts-l	-	No
Hardware	cisco	catalyst_2960x-48ts-ll	-	No
Hardware	cisco	catalyst_2960xr-24pd-i	-	No
Hardware	cisco	catalyst_2960xr-24ps-i	-	No
Hardware	cisco	catalyst_2960xr-24td-i	-	No
Hardware	cisco	catalyst_2960xr-24ts-i	-	No
Hardware	cisco	catalyst_2960xr-48fpd-i	-	No
Hardware	cisco	catalyst_2960xr-48fps-i	-	No
Hardware	cisco	catalyst_2960xr-48lpd-i	-	No
Hardware	cisco	catalyst_2960xr-48lps-i	-	No
Hardware	cisco	catalyst_2960xr-48td-i	-	No
Hardware	cisco	catalyst_2960xr-48ts-i	-	No
Hardware	cisco	catalyst_3560c-12pc-s	-	No
Hardware	cisco	catalyst_3560c-8pc-s	-	No
Hardware	cisco	catalyst_3560cg-8pc-s	-	No
Hardware	cisco	catalyst_3560cg-8tc-s	-	No
Hardware	cisco	catalyst_3560cpd-8pt-s	-	No
Hardware	cisco	catalyst_3560x-24p-e	-	No
Hardware	cisco	catalyst_3560x-24p-l	-	No
Hardware	cisco	catalyst_3560x-24p-s	-	No
Hardware	cisco	catalyst_3560x-24t-e	-	No
Hardware	cisco	catalyst_3560x-24t-l	-	No
Hardware	cisco	catalyst_3560x-24t-s	-	No
Hardware	cisco	catalyst_3560x-24u-e	-	No
Hardware	cisco	catalyst_3560x-24u-l	-	No
Hardware	cisco	catalyst_3560x-24u-s	-	No
Hardware	cisco	catalyst_3560x-48p-e	-	No
Hardware	cisco	catalyst_3560x-48p-l	-	No
Hardware	cisco	catalyst_3560x-48p-s	-	No
Hardware	cisco	catalyst_3560x-48pf-e	-	No
Hardware	cisco	catalyst_3560x-48pf-l	-	No
Hardware	cisco	catalyst_3560x-48pf-s	-	No
Hardware	cisco	catalyst_3560x-48t-e	-	No
Hardware	cisco	catalyst_3560x-48t-l	-	No
Hardware	cisco	catalyst_3560x-48t-s	-	No
Hardware	cisco	catalyst_3560x-48u-e	-	No
Hardware	cisco	catalyst_3560x-48u-l	-	No
Hardware	cisco	catalyst_3560x-48u-s	-	No
Hardware	cisco	catalyst_3750x-12s-e	-	No
Hardware	cisco	catalyst_3750x-12s-s	-	No
Hardware	cisco	catalyst_3750x-24p-e	-	No
Hardware	cisco	catalyst_3750x-24p-l	-	No
Hardware	cisco	catalyst_3750x-24p-s	-	No
Hardware	cisco	catalyst_3750x-24s-e	-	No
Hardware	cisco	catalyst_3750x-24s-s	-	No
Hardware	cisco	catalyst_3750x-24t-e	-	No
Hardware	cisco	catalyst_3750x-24t-l	-	No
Hardware	cisco	catalyst_3750x-24t-s	-	No
Hardware	cisco	catalyst_3750x-24u-e	-	No
Hardware	cisco	catalyst_3750x-24u-l	-	No
Hardware	cisco	catalyst_3750x-24u-s	-	No
Hardware	cisco	catalyst_3750x-48p-e	-	No
Hardware	cisco	catalyst_3750x-48p-l	-	No
Hardware	cisco	catalyst_3750x-48p-s	-	No
Hardware	cisco	catalyst_3750x-48pf-e	-	No
Hardware	cisco	catalyst_3750x-48pf-l	-	No
Hardware	cisco	catalyst_3750x-48pf-s	-	No
Hardware	cisco	catalyst_3750x-48t-e	-	No
Hardware	cisco	catalyst_3750x-48t-l	-	No
Hardware	cisco	catalyst_3750x-48t-s	-	No
Hardware	cisco	catalyst_3750x-48u-e	-	No
Hardware	cisco	catalyst_3750x-48u-l	-	No
Hardware	cisco	catalyst_3750x-48u-s	-	No
Hardware	cisco	catalyst_4500_supervisor_engine_6-e	-	No
Hardware	cisco	catalyst_4500_supervisor_engine_6l-e	-	No
Hardware	cisco	catalyst_4900m	-	No
Hardware	cisco	catalyst_4948e	-	No
Hardware	cisco	catalyst_4948e-f	-	No
Hardware	cisco	embedded_service_2020_24tc_con	-	No
Hardware	cisco	embedded_service_2020_24tc_con_b	-	No
Hardware	cisco	embedded_service_2020_24tc_ncp	-	No
Hardware	cisco	embedded_service_2020_24tc_ncp_b	-	No
Hardware	cisco	embedded_service_2020_con	-	No
Hardware	cisco	embedded_service_2020_con_b	-	No
Hardware	cisco	embedded_service_2020_ncp	-	No
Hardware	cisco	embedded_service_2020_ncp_b	-	No
Hardware	cisco	ie-3010-16s-8pc	-	No
Hardware	cisco	ie-3010-24tc	-	No
Hardware	cisco	ie_2000-16ptc-g	-	No
Hardware	cisco	ie_2000-16t67	-	No
Hardware	cisco	ie_2000-16t67p	-	No
Hardware	cisco	ie_2000-16tc	-	No
Hardware	cisco	ie_2000-16tc-g	-	No
Hardware	cisco	ie_2000-16tc-g-e	-	No
Hardware	cisco	ie_2000-16tc-g-n	-	No
Hardware	cisco	ie_2000-16tc-g-x	-	No
Hardware	cisco	ie_2000-24t67	-	No
Hardware	cisco	ie_2000-4s-ts-g	-	No
Hardware	cisco	ie_2000-4t	-	No
Hardware	cisco	ie_2000-4t-g	-	No
Hardware	cisco	ie_2000-4ts	-	No
Hardware	cisco	ie_2000-4ts-g	-	No
Hardware	cisco	ie_2000-8t67	-	No
Hardware	cisco	ie_2000-8t67p	-	No
Hardware	cisco	ie_2000-8tc	-	No
Hardware	cisco	ie_2000-8tc-g	-	No
Hardware	cisco	ie_2000-8tc-g-e	-	No
Hardware	cisco	ie_2000-8tc-g-n	-	No
Hardware	cisco	ie_3000-4tc	-	No
Hardware	cisco	ie_3000-8tc	-	No
Operating System	cisco	ios_xe	15.2\(2\)e4	Yes
Operating System	cisco	ios_xe	15.2\(2a\)ja	Yes
Hardware	cisco	catalyst_2960-plus_24lc-l	-	No
Hardware	cisco	catalyst_2960-plus_24lc-s	-	No
Hardware	cisco	catalyst_2960-plus_24pc-l	-	No
Hardware	cisco	catalyst_2960-plus_24pc-s	-	No
Hardware	cisco	catalyst_2960-plus_24tc-l	-	No
Hardware	cisco	catalyst_2960-plus_24tc-s	-	No
Hardware	cisco	catalyst_2960-plus_48pst-l	-	No
Hardware	cisco	catalyst_2960-plus_48pst-s	-	No
Hardware	cisco	catalyst_2960-plus_48tc-l	-	No
Hardware	cisco	catalyst_2960-plus_48tc-s	-	No
Hardware	cisco	catalyst_2960c-12pc-l	-	No
Hardware	cisco	catalyst_2960c-8pc-l	-	No
Hardware	cisco	catalyst_2960c-8tc-l	-	No
Hardware	cisco	catalyst_2960c-8tc-s	-	No
Hardware	cisco	catalyst_2960cg-8tc-l	-	No
Hardware	cisco	catalyst_2960cpd-8pt-l	-	No
Hardware	cisco	catalyst_2960cpd-8tt-l	-	No
Hardware	cisco	catalyst_2960s-24pd-l	-	No
Hardware	cisco	catalyst_2960s-24ps-l	-	No
Hardware	cisco	catalyst_2960s-24td-l	-	No
Hardware	cisco	catalyst_2960s-24ts-l	-	No
Hardware	cisco	catalyst_2960s-24ts-s	-	No
Hardware	cisco	catalyst_2960s-48fpd-l	-	No
Hardware	cisco	catalyst_2960s-48fps-l	-	No
Hardware	cisco	catalyst_2960s-48lpd-l	-	No
Hardware	cisco	catalyst_2960s-48lps-l	-	No
Hardware	cisco	catalyst_2960s-48td-l	-	No
Hardware	cisco	catalyst_2960s-48ts-l	-	No
Hardware	cisco	catalyst_2960s-48ts-s	-	No
Hardware	cisco	catalyst_2960s-f24ps-l	-	No
Hardware	cisco	catalyst_2960s-f24ts-l	-	No
Hardware	cisco	catalyst_2960s-f24ts-s	-	No
Hardware	cisco	catalyst_2960s-f48fps-l	-	No
Hardware	cisco	catalyst_2960s-f48lps-l	-	No
Hardware	cisco	catalyst_2960s-f48ts-l	-	No
Hardware	cisco	catalyst_2960s-f48ts-s	-	No
Hardware	cisco	catalyst_2960x-24pd-l	-	No
Hardware	cisco	catalyst_2960x-24ps-l	-	No
Hardware	cisco	catalyst_2960x-24psq-l_cool	-	No
Hardware	cisco	catalyst_2960x-24td-l	-	No
Hardware	cisco	catalyst_2960x-24ts-l	-	No
Hardware	cisco	catalyst_2960x-24ts-ll	-	No
Hardware	cisco	catalyst_2960x-48fpd-l	-	No
Hardware	cisco	catalyst_2960x-48fps-l	-	No
Hardware	cisco	catalyst_2960x-48lpd-l	-	No
Hardware	cisco	catalyst_2960x-48lps-l	-	No
Hardware	cisco	catalyst_2960x-48td-l	-	No
Hardware	cisco	catalyst_2960x-48ts-l	-	No
Hardware	cisco	catalyst_2960x-48ts-ll	-	No
Hardware	cisco	catalyst_2960xr-24pd-i	-	No
Hardware	cisco	catalyst_2960xr-24ps-i	-	No
Hardware	cisco	catalyst_2960xr-24td-i	-	No
Hardware	cisco	catalyst_2960xr-24ts-i	-	No
Hardware	cisco	catalyst_2960xr-48fpd-i	-	No
Hardware	cisco	catalyst_2960xr-48fps-i	-	No
Hardware	cisco	catalyst_2960xr-48lpd-i	-	No
Hardware	cisco	catalyst_2960xr-48lps-i	-	No
Hardware	cisco	catalyst_2960xr-48td-i	-	No
Hardware	cisco	catalyst_2960xr-48ts-i	-	No
Hardware	cisco	catalyst_3560c-12pc-s	-	No
Hardware	cisco	catalyst_3560c-8pc-s	-	No
Hardware	cisco	catalyst_3560cg-8pc-s	-	No
Hardware	cisco	catalyst_3560cg-8tc-s	-	No
Hardware	cisco	catalyst_3560cpd-8pt-s	-	No
Hardware	cisco	catalyst_3560x-24p-e	-	No
Hardware	cisco	catalyst_3560x-24p-l	-	No
Hardware	cisco	catalyst_3560x-24p-s	-	No
Hardware	cisco	catalyst_3560x-24t-e	-	No
Hardware	cisco	catalyst_3560x-24t-l	-	No
Hardware	cisco	catalyst_3560x-24t-s	-	No
Hardware	cisco	catalyst_3560x-24u-e	-	No
Hardware	cisco	catalyst_3560x-24u-l	-	No
Hardware	cisco	catalyst_3560x-24u-s	-	No
Hardware	cisco	catalyst_3560x-48p-e	-	No
Hardware	cisco	catalyst_3560x-48p-l	-	No
Hardware	cisco	catalyst_3560x-48p-s	-	No
Hardware	cisco	catalyst_3560x-48pf-e	-	No
Hardware	cisco	catalyst_3560x-48pf-l	-	No
Hardware	cisco	catalyst_3560x-48pf-s	-	No
Hardware	cisco	catalyst_3560x-48t-e	-	No
Hardware	cisco	catalyst_3560x-48t-l	-	No
Hardware	cisco	catalyst_3560x-48t-s	-	No
Hardware	cisco	catalyst_3560x-48u-e	-	No
Hardware	cisco	catalyst_3560x-48u-l	-	No
Hardware	cisco	catalyst_3560x-48u-s	-	No
Hardware	cisco	catalyst_3750x-12s-e	-	No
Hardware	cisco	catalyst_3750x-12s-s	-	No
Hardware	cisco	catalyst_3750x-24p-e	-	No
Hardware	cisco	catalyst_3750x-24p-l	-	No
Hardware	cisco	catalyst_3750x-24p-s	-	No
Hardware	cisco	catalyst_3750x-24s-e	-	No
Hardware	cisco	catalyst_3750x-24s-s	-	No
Hardware	cisco	catalyst_3750x-24t-e	-	No
Hardware	cisco	catalyst_3750x-24t-l	-	No
Hardware	cisco	catalyst_3750x-24t-s	-	No
Hardware	cisco	catalyst_3750x-24u-e	-	No
Hardware	cisco	catalyst_3750x-24u-l	-	No
Hardware	cisco	catalyst_3750x-24u-s	-	No
Hardware	cisco	catalyst_3750x-48p-e	-	No
Hardware	cisco	catalyst_3750x-48p-l	-	No
Hardware	cisco	catalyst_3750x-48p-s	-	No
Hardware	cisco	catalyst_3750x-48pf-e	-	No
Hardware	cisco	catalyst_3750x-48pf-l	-	No
Hardware	cisco	catalyst_3750x-48pf-s	-	No
Hardware	cisco	catalyst_3750x-48t-e	-	No
Hardware	cisco	catalyst_3750x-48t-l	-	No
Hardware	cisco	catalyst_3750x-48t-s	-	No
Hardware	cisco	catalyst_3750x-48u-e	-	No
Hardware	cisco	catalyst_3750x-48u-l	-	No
Hardware	cisco	catalyst_3750x-48u-s	-	No
Hardware	cisco	catalyst_4500_supervisor_engine_6-e	-	No
Hardware	cisco	catalyst_4500_supervisor_engine_6l-e	-	No
Hardware	cisco	catalyst_4900m	-	No
Hardware	cisco	catalyst_4948e	-	No
Hardware	cisco	catalyst_4948e-f	-	No
Hardware	cisco	embedded_service_2020_24tc_con	-	No
Hardware	cisco	embedded_service_2020_24tc_con_b	-	No
Hardware	cisco	embedded_service_2020_24tc_ncp	-	No
Hardware	cisco	embedded_service_2020_24tc_ncp_b	-	No
Hardware	cisco	embedded_service_2020_con	-	No
Hardware	cisco	embedded_service_2020_con_b	-	No
Hardware	cisco	embedded_service_2020_ncp	-	No
Hardware	cisco	embedded_service_2020_ncp_b	-	No
Hardware	cisco	ie-3010-16s-8pc	-	No
Hardware	cisco	ie-3010-24tc	-	No
Hardware	cisco	ie_2000-16ptc-g	-	No
Hardware	cisco	ie_2000-16t67	-	No
Hardware	cisco	ie_2000-16t67p	-	No
Hardware	cisco	ie_2000-16tc	-	No
Hardware	cisco	ie_2000-16tc-g	-	No
Hardware	cisco	ie_2000-16tc-g-e	-	No
Hardware	cisco	ie_2000-16tc-g-n	-	No
Hardware	cisco	ie_2000-16tc-g-x	-	No
Hardware	cisco	ie_2000-24t67	-	No
Hardware	cisco	ie_2000-4s-ts-g	-	No
Hardware	cisco	ie_2000-4t	-	No
Hardware	cisco	ie_2000-4t-g	-	No
Hardware	cisco	ie_2000-4ts	-	No
Hardware	cisco	ie_2000-4ts-g	-	No
Hardware	cisco	ie_2000-8t67	-	No
Hardware	cisco	ie_2000-8t67p	-	No
Hardware	cisco	ie_2000-8tc	-	No
Hardware	cisco	ie_2000-8tc-g	-	No
Hardware	cisco	ie_2000-8tc-g-e	-	No
Hardware	cisco	ie_2000-8tc-g-n	-	No
Hardware	cisco	ie_3000-4tc	-	No
Hardware	cisco	ie_3000-8tc	-	No

References

http://www.securityfocus.com/bid/103569 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1040596 Third Party Advisory, VDB Entry ([email protected])
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource ([email protected])
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/103569 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1040596 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0156 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.