{"id":"CVE-2021-35977","aliases":["EUVD-2021-22610","GHSA-g5mc-mhmx-jqjp"],"status":"published","title":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists...","description":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01579,"percentile":0.75678,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2021-10-08T14:19:04Z","modified":"2026-06-17T03:58:08Z","products":[{"vendor":"digi","product":"6350-sr_firmware"},{"vendor":"digi","product":"cm_firmware"},{"vendor":"digi","product":"connect_es_firmware"},{"vendor":"digi","product":"connectport_lts_8\\/16\\/32_firmware"},{"vendor":"digi","product":"connectport_ts_8\\/16_firmware"},{"vendor":"digi","product":"one_ia_firmware"},{"vendor":"digi","product":"one_iap_family_firmware"},{"vendor":"digi","product":"passport_integrated_console_server_firmware"},{"vendor":"digi","product":"portserver_ts_firmware"},{"vendor":"digi","product":"portserver_ts_m_mei_firmware"},{"vendor":"digi","product":"portserver_ts_mei_firmware"},{"vendor":"digi","product":"portserver_ts_mei_hardened_firmware"},{"vendor":"digi","product":"portserver_ts_p_mei_firmware"},{"vendor":"digi","product":"realport"},{"vendor":"digi","product":"transport_wr11_xt_firmware"},{"vendor":"digi","product":"wr21_firmware"},{"vendor":"digi","product":"wr31_firmware"},{"vendor":"digi","product":"wr44_r_firmware"}],"references":[{"url":"https://raw.githubusercontent.com/reidmefirst/vuln-disclosure/main/2021-02.txt","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-35977"},{"url":"https://github.com/advisories/GHSA-g5mc-mhmx-jqjp"}],"sources":{"cve":[{"id":"CVE-2021-35977","description":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.","status":"published","published":"2021-10-08T14:19:04Z","modified":"2024-08-04T00:47:43.502Z","updated_at":"2026-11-02T14:33:09.864034Z"}],"euvd":[{"id":"EUVD-2021-22610","description":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.","status":"published","published":"2021-10-08T14:19:04Z","modified":"2024-08-04T00:47:43Z","updated_at":"2026-11-03T03:24:29.877227Z"}],"ghsa":[{"id":"GHSA-g5mc-mhmx-jqjp","title":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists...","description":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.","status":"published","published":"2022-05-24T19:17:03Z","modified":"2023-05-26T18:30:19Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:54:36.625859Z"}],"nvd":[{"id":"CVE-2021-35977","description":"An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.","status":"published","published":"2021-10-08T15:15:08.87Z","modified":"2026-06-17T03:58:08.29Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:59.689345Z"}]}}