{"schema_version":"1.9.0","id":"CVE-2026-21620","published":"2026-02-20T10:57:08.620Z","modified":"2026-08-12T03:51:28.613494661Z","aliases":["EEF-CVE-2026-21620","GHSA-hmrc-prh3-rpvp"],"related":["SUSE-SU-2026:1714-1","SUSE-SU-2026:2010-1","SUSE-SU-2026:21374-1","openSUSE-SU-2026:10947-1","openSUSE-SU-2026:20607-1"],"summary":"TFTP Path Traversal","details":"Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.erl.\n\nThis issue affects OTP from OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/erlang/otp","events":[{"introduced":"0"},{"introduced":"601a012837ea0a5c8095bf24223132824177124d"},{"introduced":"9e6f6742c4d9e9915ee8af0dcb7d97cf1f836116"},{"fixed":"3532818e19647ae5675396eb501400783e5ca693"},{"fixed":"61633c62611720cc27f92026d075a1f2862ce522"},{"fixed":"b74eae92e1dee97d57a9ab3ea3c36e8b701a9ca6"},{"fixed":"3970738f687325138eb75f798054fa8960ac354e"},{"fixed":"655fb95725ba2fb811740b57e106873833824344"},{"fixed":"696fdec922661d4a3cc528fc34bc24fae8d4ad8a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"26.2.5.17"},{"introduced":"27.0"},{"fixed":"27.3.4.8"},{"introduced":"28.0"},{"fixed":"28.3.2"}],"source":["CPE_FIELD","REFERENCES"]}}],"versions":["patch-base-27","OTP-27.3.4","OTP-27.0","patch-base-26","OTP-26.2.5","OTP-26.2.5.9","OTP-28.0","OTP-27.3.4.6","OTP-27.3.4.7","OTP-28.3.1","OTP-28.3","OTP-26.2.5.16","OTP-26.2.5.12","OTP-27.3","OTP-27.3.4.5","OTP-27.3.4.4","OTP-26.2.5.15","OTP-26.2.3","OTP-28.1","OTP-27.3.4.3","OTP-27.3.3","OTP-26.2.5.14","OTP-27.3.4.2","OTP-26.0","OTP-26.2.5.13","OTP-25.0","OTP-27.3.4.1","OTP-26.2.5.11","OTP-27.3.2","OTP-26.2.5.10","OTP-27.2","OTP-27.3.1","OTP-26.2.5.8","OTP-26.2.5.7","OTP-26.2.5.6","OTP-27.1","OTP-26.2.5.5","OTP-26.2.5.4","OTP-26.2.5.3","OTP-26.2","OTP-26.2.5.2","OTP-26.2.5.1","OTP-26.2.4","OTP-24.0","OTP-26.1","OTP-26.0-rc3","OTP-26.0-rc2","OTP-26.0-rc1","OTP-23.0","OTP-21.0","OTP-25.0-rc3","OTP-25.0-rc2","OTP-25.0-rc1","OTP-22.0","OTP-24.0-rc3","OTP-24.0-rc2","OTP-24.0-rc1","OTP-23.0-rc3","OTP-23.0-rc2","OTP-23.0-rc1","OTP-20.0","OTP-22.0-rc3","OTP-22.0-rc2","OTP-22.0-rc1","OTP-19.0","OTP-21.0-rc2","OTP-18.0","OTP-21.0-rc1","OTP-17.0","OTP-20.0-rc2","OTP-20.0-rc1","OTP-19.0-rc2","OTP-19.0-rc1","OTP_R16B","OTP-18.0-rc1","OTP_17.0-rc2","OTP_17.0-rc1","OTP_R13B03","OTP_R16A_RELEASE_CANDIDATE","OTP_R14B03","OTP_R15B","OTP_R15A","OTP_R14B02","OTP_R14B01","OTP_R14B","OTP_R13B04","OTP_R14A"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21620.json"}}],"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-21620.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-21620"},{"type":"WEB","url":"https://www.erlang.org/doc/system/versions.html#order-of-versions"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21620.json"},{"type":"ADVISORY","url":"https://github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21620"},{"type":"FIX","url":"https://github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354e"},{"type":"FIX","url":"https://github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344"},{"type":"FIX","url":"https://github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8a"},{"type":"FIX","url":"https://github.com/erlang/otp/pull/10706"},{"type":"PACKAGE","url":"https://github.com/erlang/otp"}],"database_specific":{"cna_assigner":"EEF","cwe_ids":["CWE-23"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21620.json","unresolved_ranges":[{"extracted_events":[{"introduced":"17.0"},{"fixed":"*"},{"introduced":"07b8f441ca711f9812fad9e9115bab3c3aa92f79"},{"fixed":"*"},{"introduced":"5.10"},{"fixed":"7.0"},{"introduced":"1.0"},{"fixed":"*"}],"source":"AFFECTED_FIELD"}]},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}]}