{"id":"CVE-2021-29242","aliases":["EUVD-2021-15881","GHSA-85g9-hgxq-755v"],"status":"published","title":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send...","description":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01278,"percentile":0.70397,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2021-05-03T13:56:06Z","modified":"2026-06-17T03:47:26Z","products":[{"vendor":"codesys","product":"control_for_beaglebone_sl"},{"vendor":"codesys","product":"control_for_empc-a\\/imx6_sl"},{"vendor":"codesys","product":"control_for_iot2000_sl"},{"vendor":"codesys","product":"control_for_linux_arm_sl"},{"vendor":"codesys","product":"control_for_linux_sl"},{"vendor":"codesys","product":"control_for_pfc100_sl"},{"vendor":"codesys","product":"control_for_pfc200_sl"},{"vendor":"codesys","product":"control_for_plcnext_sl"},{"vendor":"codesys","product":"control_for_raspberry_pi_sl"},{"vendor":"codesys","product":"control_for_wago_touch_panels_600_sl"},{"vendor":"codesys","product":"control_rte"},{"vendor":"codesys","product":"control_runtime_system_toolkit"},{"vendor":"codesys","product":"control_win"},{"vendor":"codesys","product":"edge_gateway"},{"vendor":"codesys","product":"embedded_target_visu_toolkit"},{"vendor":"codesys","product":"gateway"},{"vendor":"codesys","product":"hmi"},{"vendor":"codesys","product":"opc_server"},{"vendor":"codesys","product":"plchandler"},{"vendor":"codesys","product":"remote_target_visu_toolkit"},{"vendor":"codesys","product":"safety_sil"},{"vendor":"codesys","product":"simulation_runtime"}],"references":[{"url":"https://customers.codesys.com/index.php","tags":["x_refsource_MISC","x_transferred","Permissions Required","Vendor Advisory"]},{"url":"https://www.codesys.com/security/security-reports.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=14640\u0026token=623b6fceb0579ef0f7505e29beefa5b3f8ac7873\u0026download=","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29242"},{"url":"https://github.com/advisories/GHSA-85g9-hgxq-755v"}],"sources":{"cve":[{"id":"CVE-2021-29242","description":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.","status":"published","published":"2021-05-03T13:56:06Z","modified":"2024-08-03T22:02:51.582Z","updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-15881","description":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.","status":"published","published":"2021-05-03T13:56:06Z","modified":"2024-08-03T22:02:51Z","updated_at":"2026-11-03T03:24:45.000012Z"}],"ghsa":[{"id":"GHSA-85g9-hgxq-755v","title":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send...","description":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.","status":"published","published":"2022-05-24T17:49:23Z","modified":"2023-01-29T05:06:09Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:45:57.703827Z"}],"nvd":[{"id":"CVE-2021-29242","description":"CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.","status":"published","published":"2021-05-03T14:15:07.667Z","modified":"2026-06-17T03:47:26.127Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","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-20"],"updated_at":"2026-11-02T14:06:52.81233Z"}]}}