{"id":"CVE-2020-22552","aliases":["EUVD-2020-15312","GHSA-c87p-2q2j-cwwp"],"status":"published","title":"The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP...","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01473,"percentile":0.74031,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-10-28T13:51:44Z","modified":"2026-07-09T00:16:58Z","products":[{"vendor":"snap7_project","product":"snap7"}],"references":[{"url":"https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://sourceforge.net/projects/snap7/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-22552"},{"url":"http://snap7.com"},{"url":"https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde"},{"url":"https://sourceforge.net/projects/snap7"},{"url":"https://github.com/advisories/GHSA-c87p-2q2j-cwwp"}],"sources":{"cve":[{"id":"CVE-2020-22552","description":"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.","status":"published","published":"2020-10-28T13:51:44Z","modified":"2026-07-09T00:10:37.459Z","updated_at":"2026-11-02T14:35:46.873079Z"}],"euvd":[{"id":"EUVD-2020-15312","description":"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.","status":"published","published":"2020-10-28T13:51:44Z","modified":"2026-07-09T00:10:37Z","updated_at":"2026-11-02T18:20:09.583461Z"}],"ghsa":[{"id":"GHSA-c87p-2q2j-cwwp","title":"The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP...","description":"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.","status":"published","published":"2022-05-24T17:32:32Z","modified":"2026-07-05T00:31:15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:09:14.376377Z"}],"nvd":[{"id":"CVE-2020-22552","description":"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.","status":"published","published":"2020-10-28T14:15:12.253Z","modified":"2026-07-09T00:16:58.137Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:21.80969Z"}]}}