{"id":"CVE-2021-36762","aliases":["EUVD-2021-23350","GHSA-xj6g-7vq6-3mcm"],"status":"published","title":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c...","description":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\\0' byte exists within a reasonable range).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.023,"percentile":0.8353,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-273"],"published":"2021-08-19T11:09:58Z","modified":"2026-06-17T03:59:07Z","products":[{"vendor":"hcc-embedded","product":"nichestack"}],"references":[{"url":"https://www.hcc-embedded.com/about/about-interniche","tags":["x_refsource_MISC","x_transferred","Product"]},{"url":"https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/","tags":["x_refsource_MISC","x_transferred","Mitigation","Third Party Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/608209","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36762"},{"url":"https://github.com/advisories/GHSA-xj6g-7vq6-3mcm"}],"sources":{"cve":[{"id":"CVE-2021-36762","description":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\\0' byte exists within a reasonable range).","status":"published","published":"2021-08-19T11:09:58Z","modified":"2024-08-04T01:01:59.411Z","updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-23350","description":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\\0' byte exists within a reasonable range).","status":"published","published":"2021-08-19T11:09:58Z","modified":"2024-08-04T01:01:59Z","updated_at":"2026-11-03T03:24:29.329171Z"}],"ghsa":[{"id":"GHSA-xj6g-7vq6-3mcm","title":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c...","description":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\\0' byte exists within a reasonable range).","status":"published","published":"2022-05-24T19:11:41Z","modified":"2023-08-17T05:02:15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-273"],"updated_at":"2026-11-02T14:54:45.82233Z"}],"nvd":[{"id":"CVE-2021-36762","description":"An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\\0' byte exists within a reasonable range).","status":"published","published":"2021-08-19T12:15:09.133Z","modified":"2026-06-17T03:59:07.493Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":7.8,"vector":"AV:N/AC:L/Au:N/C:C/I:N/A:N","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:57.318236Z"}]}}