{"id":"CVE-2021-32976","aliases":["EUVD-2021-19697","GHSA-gr95-77pj-2gv2"],"status":"published","title":"Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-based Buffer Overflow","description":"Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.","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":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.02785,"percentile":0.86518,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-787"],"published":"2022-04-01T22:17:14Z","modified":"2026-06-17T03:53:55Z","products":[{"vendor":"moxa","product":"nport iaw5000a-i/o series firmware"},{"vendor":"moxa","product":"nport_iaw5150a-12i\\/o_firmware"},{"vendor":"moxa","product":"nport_iaw5150a-6i\\/o_firmware"},{"vendor":"moxa","product":"nport_iaw5250a-12i\\/o_firmware"},{"vendor":"moxa","product":"nport_iaw5250a-6i\\/o_firmware"}],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Third Party Advisory","US Government Resource"]},{"url":"https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32976"},{"url":"https://github.com/advisories/GHSA-gr95-77pj-2gv2"}],"sources":{"cve":[{"id":"CVE-2021-32976","title":"Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-based Buffer Overflow","description":"Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.","status":"published","published":"2022-04-01T22:17:14Z","modified":"2025-04-16T16:33:12.438Z","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":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2021-19697","description":"Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.","status":"published","published":"2022-04-01T22:17:14Z","modified":"2025-04-16T16:33:12Z","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"}],"updated_at":"2026-11-02T20:52:23.922531Z"}],"ghsa":[{"id":"GHSA-gr95-77pj-2gv2","title":"Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware...","description":"Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.","status":"published","published":"2022-04-03T00:01:02Z","modified":"2023-01-27T05:01:20Z","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-787"],"updated_at":"2026-11-02T14:41:52.138061Z"}],"nvd":[{"id":"CVE-2021-32976","description":"Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.","status":"published","published":"2022-04-01T23:15:10.083Z","modified":"2026-06-17T03:53:55.913Z","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":"secondary"},{"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-121","CWE-787"],"updated_at":"2026-11-02T14:07:05.581807Z"}]}}