{
    "containers": {
        "cna": {
            "affected": [
                {
                    "product": "n/a",
                    "vendor": "n/a",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "n/a"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "description": "n/a",
                            "lang": "en",
                            "type": "text"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "dateUpdated": "2026-07-04T23:32:30.356Z",
                "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
                "shortName": "mitre"
            },
            "references": [
                {
                    "url": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/"
                },
                {
                    "url": "https://sourceforge.net/projects/snap7/"
                }
            ],
            "x_legacyV4Record": {
                "CVE_data_meta": {
                    "ASSIGNER": "cve@mitre.org",
                    "ID": "CVE-2020-22552",
                    "STATE": "PUBLIC"
                },
                "affects": {
                    "vendor": {
                        "vendor_data": [
                            {
                                "product": {
                                    "product_data": [
                                        {
                                            "product_name": "n/a",
                                            "version": {
                                                "version_data": [
                                                    {
                                                        "version_value": "n/a"
                                                    }
                                                ]
                                            }
                                        }
                                    ]
                                },
                                "vendor_name": "n/a"
                            }
                        ]
                    }
                },
                "data_format": "MITRE",
                "data_type": "CVE",
                "data_version": "4.0",
                "description": {
                    "description_data": [
                        {
                            "lang": "eng",
                            "value": "The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed."
                        }
                    ]
                },
                "problemtype": {
                    "problemtype_data": [
                        {
                            "description": [
                                {
                                    "lang": "eng",
                                    "value": "n/a"
                                }
                            ]
                        }
                    ]
                },
                "references": {
                    "reference_data": [
                        {
                            "name": "http://snap7.com",
                            "refsource": "MISC",
                            "url": "http://snap7.com"
                        },
                        {
                            "name": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/",
                            "refsource": "MISC",
                            "url": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/"
                        },
                        {
                            "name": "https://sourceforge.net/projects/snap7/",
                            "refsource": "MISC",
                            "url": "https://sourceforge.net/projects/snap7/"
                        }
                    ]
                }
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-07-09T00:10:37.459Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/"
                    },
                    {
                        "tags": [
                            "x_refsource_MISC",
                            "x_transferred"
                        ],
                        "url": "https://sourceforge.net/projects/snap7/"
                    }
                ]
            }
        ]
    },
    "cveMetadata": {
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "assignerShortName": "mitre",
        "cveId": "CVE-2020-22552",
        "datePublished": "2020-10-28T13:51:44.000Z",
        "dateReserved": "2020-08-13T00:00:00.000Z",
        "dateUpdated": "2026-07-09T00:10:37.459Z",
        "state": "PUBLISHED"
    },
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2"
}