{"id":"CVE-2021-25676","aliases":["EUVD-2021-12568","GHSA-pg2c-638q-xw3m"],"status":"published","title":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE...","description":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions \u003e= V2.1 and \u003c V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.","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":"2026-11-11","score":0.01336,"percentile":0.71586,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-307"],"published":"2021-03-15T17:03:31Z","modified":"2026-06-17T03:42:20Z","products":[{"vendor":"siemens","product":"ruggedcom rm1224"},{"vendor":"siemens","product":"ruggedcom_rm1224_firmware"},{"vendor":"siemens","product":"scalance m-800"},{"vendor":"siemens","product":"scalance s615"},{"vendor":"siemens","product":"scalance sc-600"},{"vendor":"siemens","product":"scalance_m-800_firmware"},{"vendor":"siemens","product":"scalance_s615_firmware"},{"vendor":"siemens","product":"scalance_sc-600_firmware"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-296266.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-068-02","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25676"},{"url":"https://github.com/advisories/GHSA-pg2c-638q-xw3m"}],"sources":{"cve":[{"id":"CVE-2021-25676","description":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions \u003e= V2.1 and \u003c V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.","status":"published","published":"2021-03-15T17:03:31Z","modified":"2024-08-03T20:11:27.563Z","cwes":["CWE-307"],"updated_at":"2026-11-02T14:32:59.802172Z"}],"euvd":[{"id":"EUVD-2021-12568","description":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions \u003e= V2.1 and \u003c V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.","status":"published","published":"2021-03-15T17:03:31Z","modified":"2024-08-03T20:11:27Z","updated_at":"2026-11-03T03:24:52.420769Z"}],"ghsa":[{"id":"GHSA-pg2c-638q-xw3m","title":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE...","description":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions \u003e= V2.1 and \u003c V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.","status":"published","published":"2022-05-24T17:44:34Z","modified":"2023-01-29T05:06:05Z","cwes":["CWE-307"],"updated_at":"2026-11-02T14:45:56.584389Z"}],"nvd":[{"id":"CVE-2021-25676","description":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions \u003e= V2.1 and \u003c V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.","status":"published","published":"2021-03-15T17:15:22.127Z","modified":"2026-06-17T03:42:20.437Z","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"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}