{"id":"CVE-2016-20009","aliases":["EUVD-2016-3097","GHSA-347g-p4qh-9qw2"],"status":"published","title":"** UNSUPPORTED WHEN ASSIGNED ** A DNS client stack-based buffer overflow in ipdnsc_decode_name()...","description":"A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer","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":"2026-11-08","score":0.01857,"percentile":0.79339,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2021-03-11T21:39:25Z","modified":"2026-06-17T00:43:04Z","products":[{"vendor":"siemens","product":"sgt-100_firmware"},{"vendor":"siemens","product":"sgt-200_firmware"},{"vendor":"siemens","product":"sgt-300_firmware"},{"vendor":"siemens","product":"sgt-400_firmware"},{"vendor":"siemens","product":"sgt-a20_firmware"},{"vendor":"siemens","product":"sgt-a35_firmware"},{"vendor":"siemens","product":"sgt-a65_firmware"},{"vendor":"windriver","product":"vxworks"}],"references":[{"url":"https://blog.exodusintel.com/2016/08/09/vxworks-execute-my-packets/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-553445.pdf","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-20009"},{"url":"https://blog.exodusintel.com/2016/08/09/vxworks-execute-my-packets"},{"url":"https://github.com/advisories/GHSA-347g-p4qh-9qw2"}],"sources":{"cve":[{"id":"CVE-2016-20009","description":"A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer","status":"published","published":"2021-03-11T21:39:25Z","modified":"2024-08-06T03:47:34.869Z","updated_at":"2026-11-02T14:33:30.359814Z"}],"euvd":[{"id":"EUVD-2016-3097","description":"A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer","status":"published","published":"2021-03-11T21:39:25Z","modified":"2024-08-06T03:47:34Z","updated_at":"2026-11-03T02:22:21.756675Z"}],"ghsa":[{"id":"GHSA-347g-p4qh-9qw2","title":"** UNSUPPORTED WHEN ASSIGNED ** A DNS client stack-based buffer overflow in ipdnsc_decode_name()...","description":"** UNSUPPORTED WHEN ASSIGNED ** A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.","status":"published","published":"2022-05-24T17:44:14Z","modified":"2024-03-21T03:34:03Z","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":"2026-11-02T14:55:42.026509Z"}],"nvd":[{"id":"CVE-2016-20009","description":"A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer","status":"published","published":"2021-03-11T22:15:12.12Z","modified":"2026-06-17T00:43:04.667Z","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-787"],"updated_at":"2026-11-02T14:03:40.524348Z"}]}}