{
    "id": "CVE-2021-22945",
    "published": "2021-09-23 13:15:08",
    "last_modified": "2026-06-17 03:38:04",
    "cvss_score": "9.1",
    "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:N/A:H",
    "cwe": "CWE-415",
    "description": "When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.",
    "epss_score": "0.06677",
    "epss_percentile": "0.93717",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-06 18:17:25",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.1), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "apple",
            "product": "macos"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "haxx",
            "product": "libcurl"
        },
        {
            "vendor": "netapp",
            "product": "cloud_backup"
        },
        {
            "vendor": "netapp",
            "product": "clustered_data_ontap"
        },
        {
            "vendor": "netapp",
            "product": "h300e"
        },
        {
            "vendor": "netapp",
            "product": "h300e_firmware"
        },
        {
            "vendor": "netapp",
            "product": "h300s"
        },
        {
            "vendor": "netapp",
            "product": "h300s_firmware"
        },
        {
            "vendor": "netapp",
            "product": "h410s"
        },
        {
            "vendor": "netapp",
            "product": "h410s_firmware"
        },
        {
            "vendor": "netapp",
            "product": "h500e"
        },
        {
            "vendor": "netapp",
            "product": "h500e_firmware"
        },
        {
            "vendor": "netapp",
            "product": "h500s"
        },
        {
            "vendor": "netapp",
            "product": "h500s_firmware"
        },
        {
            "vendor": "netapp",
            "product": "h700e"
        },
        {
            "vendor": "netapp",
            "product": "h700e_firmware"
        },
        {
            "vendor": "netapp",
            "product": "h700s"
        },
        {
            "vendor": "netapp",
            "product": "h700s_firmware"
        },
        {
            "vendor": "netapp",
            "product": "solidfire_baseboard_management_controller"
        },
        {
            "vendor": "netapp",
            "product": "solidfire_baseboard_management_controller_firmware"
        },
        {
            "vendor": "oracle",
            "product": "mysql_server"
        },
        {
            "vendor": "siemens",
            "product": "sinec_ins"
        },
        {
            "vendor": "splunk",
            "product": "universal_forwarder"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://seclists.org/fulldisclosure/2022/Mar/29",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
        "https://hackerone.com/reports/1269242",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/",
        "https://security.gentoo.org/glsa/202212-01",
        "https://security.netapp.com/advisory/ntap-20211029-0003/",
        "https://support.apple.com/kb/HT213183",
        "https://www.debian.org/security/2022/dsa-5197",
        "https://www.oracle.com/security-alerts/cpuoct2021.html",
        "http://seclists.org/fulldisclosure/2022/Mar/29",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
        "https://hackerone.com/reports/1269242",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/",
        "https://security.gentoo.org/glsa/202212-01",
        "https://security.netapp.com/advisory/ntap-20211029-0003/",
        "https://support.apple.com/kb/HT213183",
        "https://www.debian.org/security/2022/dsa-5197",
        "https://www.oracle.com/security-alerts/cpuoct2021.html"
    ]
}