{
    "id": "CVE-2018-0156",
    "published": "2018-03-28 22:29:00",
    "last_modified": "2026-06-17 01:29:57",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "cwe": "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.",
    "epss_score": "0.08599",
    "epss_percentile": "0.94907",
    "kev": 1,
    "kev_due": "2022-03-17",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:19",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-03-17."
    },
    "products": [
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_24lc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_24lc-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_24pc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_24pc-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_24tc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_24tc-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_48pst-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_48pst-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_48tc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960-plus_48tc-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960c-12pc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960c-8pc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960c-8tc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960c-8tc-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960cg-8tc-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960cpd-8pt-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960cpd-8tt-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-24pd-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-24ps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-24td-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-24ts-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-24ts-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48fpd-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48fps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48lpd-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48lps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48td-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48ts-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-48ts-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f24ps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f24ts-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f24ts-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f48fps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f48lps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f48ts-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960s-f48ts-s"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960x-24pd-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960x-24ps-l"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_2960x-24psq-l_cool"
        },
        {
            "vendor": "cisco",
            "product": "ios"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2018-0156",
        "date_added": "2022-03-03",
        "due_date": "2022-03-17",
        "vendor": "Cisco",
        "product": "IOS Software and Cisco IOS XE Software",
        "name": "Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://www.securityfocus.com/bid/103569",
        "http://www.securitytracker.com/id/1040596",
        "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04",
        "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi",
        "http://www.securityfocus.com/bid/103569",
        "http://www.securitytracker.com/id/1040596",
        "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04",
        "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0156"
    ]
}