{"id":"CVE-2023-36521","aliases":["EUVD-2023-40470","GHSA-g2ch-vrrq-vf7w"],"status":"published","title":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S ...","description":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S (All versions \u003c V3.3.4), SIMATIC MV550 H (All versions \u003c V3.3.4), SIMATIC MV550 S (All versions \u003c V3.3.4), SIMATIC MV560 U (All versions \u003c V3.3.4), SIMATIC MV560 X (All versions \u003c V3.3.4). The result synchronization server of the affected products contains a\r\nvulnerability that may lead to a denial of service condition. An attacker may\r\ncause a denial of service situation of all socket-based communication of the\r\naffected products if the result server is enabled.","severity":{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00626,"percentile":0.50543,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2023-07-11T09:07:13Z","modified":"2026-10-23T23:10:00Z","products":[{"vendor":"siemens","product":"simatic mv540 h"},{"vendor":"siemens","product":"simatic mv540 s"},{"vendor":"siemens","product":"simatic mv550 h"},{"vendor":"siemens","product":"simatic mv550 s"},{"vendor":"siemens","product":"simatic mv560 u"},{"vendor":"siemens","product":"simatic mv560 x"},{"vendor":"siemens","product":"simatic_mv540_h"},{"vendor":"siemens","product":"simatic_mv540_h_firmware"},{"vendor":"siemens","product":"simatic_mv540_s"},{"vendor":"siemens","product":"simatic_mv540_s_firmware"},{"vendor":"siemens","product":"simatic_mv550_h"},{"vendor":"siemens","product":"simatic_mv550_h_firmware"},{"vendor":"siemens","product":"simatic_mv550_s"},{"vendor":"siemens","product":"simatic_mv550_s_firmware"},{"vendor":"siemens","product":"simatic_mv560_u"},{"vendor":"siemens","product":"simatic_mv560_u_firmware"},{"vendor":"siemens","product":"simatic_mv560_x"},{"vendor":"siemens","product":"simatic_mv560_x_firmware"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-561322.pdf","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36521"},{"url":"https://github.com/advisories/GHSA-g2ch-vrrq-vf7w"}],"sources":{"cve":[{"id":"CVE-2023-36521","description":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S (All versions \u003c V3.3.4), SIMATIC MV550 H (All versions \u003c V3.3.4), SIMATIC MV550 S (All versions \u003c V3.3.4), SIMATIC MV560 U (All versions \u003c V3.3.4), SIMATIC MV560 X (All versions \u003c V3.3.4). The result synchronization server of the affected products contains a\r\nvulnerability that may lead to a denial of service condition. An attacker may\r\ncause a denial of service situation of all socket-based communication of the\r\naffected products if the result server is enabled.","status":"published","published":"2023-07-11T09:07:13.637Z","modified":"2024-11-21T14:09:57.839Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:35:28.218693Z"}],"euvd":[{"id":"EUVD-2023-40470","description":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S (All versions \u003c V3.3.4), SIMATIC MV550 H (All versions \u003c V3.3.4), SIMATIC MV550 S (All versions \u003c V3.3.4), SIMATIC MV560 U (All versions \u003c V3.3.4), SIMATIC MV560 X (All versions \u003c V3.3.4). The result synchronization server of the affected products contains a\r\nvulnerability that may lead to a denial of service condition. An attacker may\r\ncause a denial of service situation of all socket-based communication of the\r\naffected products if the result server is enabled.","status":"published","published":"2023-07-11T09:07:13Z","modified":"2024-11-21T14:09:57Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T00:04:52.909214Z"}],"ghsa":[{"id":"GHSA-g2ch-vrrq-vf7w","title":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S ...","description":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S (All versions \u003c V3.3.4), SIMATIC MV550 H (All versions \u003c V3.3.4), SIMATIC MV550 S (All versions \u003c V3.3.4), SIMATIC MV560 U (All versions \u003c V3.3.4), SIMATIC MV560 X (All versions \u003c V3.3.4). The result synchronization server of the affected products contains a\nvulnerability that may lead to a denial of service condition. An attacker may\ncause a denial of service situation of all socket-based communication of the\naffected products if the result server is enabled.","status":"published","published":"2023-07-11T12:30:35Z","modified":"2024-04-04T05:55:35Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:56:37.005335Z"}],"nvd":[{"id":"CVE-2023-36521","description":"A vulnerability has been identified in SIMATIC MV540 H (All versions \u003c V3.3.4), SIMATIC MV540 S (All versions \u003c V3.3.4), SIMATIC MV550 H (All versions \u003c V3.3.4), SIMATIC MV550 S (All versions \u003c V3.3.4), SIMATIC MV560 U (All versions \u003c V3.3.4), SIMATIC MV560 X (All versions \u003c V3.3.4). The result synchronization server of the affected products contains a\r\nvulnerability that may lead to a denial of service condition. An attacker may\r\ncause a denial of service situation of all socket-based communication of the\r\naffected products if the result server is enabled.","status":"published","published":"2023-07-11T10:15:10.897Z","modified":"2026-10-23T23:10:00.157Z","cvss":[{"version":"3.1","score":8.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"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"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:08:15.127597Z"}]}}