CVE-2026-21620
TFTP Path Traversal
CVSS Score
0.0
EPSS Score
0.5%
EPSS Percentile
37th
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. This 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.
| CWE | CWE-23 |
| Vendor | erlang |
| Product | otp |
| Published | Feb 20, 2026 |
| Last Updated | Jul 24, 2026 |
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Affected Versions
Erlang / OTP
17.0 < * 07b8f441ca711f9812fad9e9115bab3c3aa92f79 < *
Erlang / OTP
5.10 < 7.0
Erlang / OTP
1.0 < *
References
github.com: https://github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvp cna.erlef.org: https://cna.erlef.org/cves/CVE-2026-21620.html osv.dev: https://osv.dev/vulnerability/EEF-CVE-2026-21620 erlang.org: https://www.erlang.org/doc/system/versions.html#order-of-versions github.com: https://github.com/erlang/otp/pull/10706 github.com: https://github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8a github.com: https://github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354e github.com: https://github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344
Credits
Luigino Camastra / Aisle Research Jakub Witczak Raimo Niskanen