{
    "id": "CVE-2020-3161",
    "published": "2020-04-15 20:15:15",
    "last_modified": "2026-06-17 03:17:31",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-20",
    "description": "A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.",
    "epss_score": "0.83855",
    "epss_percentile": "0.99684",
    "kev": 1,
    "kev_due": "2022-05-03",
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:25:48",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-05-03."
    },
    "products": [
        {
            "vendor": "cisco",
            "product": "8831"
        },
        {
            "vendor": "cisco",
            "product": "8831_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7811"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7811_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7821"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7821_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7841"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7841_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7861"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_7861_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8811"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8811_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8821"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8821_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8821-ex"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8821-ex_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8841"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8841_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8845"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8845_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8851"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8851_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8861"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8861_firmware"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8865"
        },
        {
            "vendor": "cisco",
            "product": "ip_phone_8865_firmware"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2020-3161",
        "date_added": "2021-11-03",
        "due_date": "2022-05-03",
        "vendor": "Cisco",
        "product": "Cisco IP Phones",
        "name": "Cisco IP Phones Web Server Remote Code Execution and Denial-of-Service Vulnerability",
        "ransomware": 0
    },
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "48342",
            "title": "Cisco IP Phone 11.7 - Denial of service (PoC)",
            "date": "2020-04-17",
            "url": "https://www.exploit-db.com/exploits/48342"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs",
        "http://packetstormsecurity.com/files/157265/Cisco-IP-Phone-11.7-Denial-Of-Service.html",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3161"
    ]
}