{"id":"CVE-2026-51218","aliases":["EUVD-2026-40244","GHSA-6m46-rpq9-jh59"],"status":"published","title":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of...","description":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.","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":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00569,"percentile":0.47472,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-06-29T00:00:00Z","modified":"2026-07-30T19:18:05Z","references":[{"url":"https://github.com/davenardella/snap7"},{"url":"https://github.com/davenardella/snap7/issues/14","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-51218"},{"url":"https://github.com/advisories/GHSA-6m46-rpq9-jh59"}],"sources":{"cve":[{"id":"CVE-2026-51218","description":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.","status":"published","published":"2026-06-29T00:00:00Z","modified":"2026-07-30T16:50:13.496Z","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":"adp"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:39:50.160666Z"}],"euvd":[{"id":"EUVD-2026-40244","description":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.","status":"published","published":"2026-06-29T00:00:00Z","modified":"2026-07-30T16:50:13Z","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":"2026-11-02T18:02:28.035906Z"}],"ghsa":[{"id":"GHSA-6m46-rpq9-jh59","title":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of...","description":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.","status":"published","published":"2026-06-30T00:31:30Z","modified":"2026-06-30T15:31:47Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:09:05.934873Z"}],"nvd":[{"id":"CVE-2026-51218","description":"A heap buffer overflow in the TS7Worker::PerformFunctionWrite() function (/core/s7_server.cpp) of snap7 v1.4.3 allows attackers to cause a Denial of Service (DoS) via a crafted packet.","status":"published","published":"2026-06-29T23:16:42.623Z","modified":"2026-07-30T19:18:05.107Z","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":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:26.508751Z"}]}}