← back
CVE-2026-21620lowCWE-23

TFTP Path Traversal

8Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 2.3epss 0.5%
exploitation probability
0.5%top 62% of all CVEs
observed exploitation
nono source reports it
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.
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
Affected products
Erlang · OTP
References
https://cna.erlef.org/cves/CVE-2026-21620.htmlhttps://github.com/erlang/otp/commit/3970738f687325138eb75f798054fa8960ac354ehttps://github.com/erlang/otp/commit/655fb95725ba2fb811740b57e106873833824344https://github.com/erlang/otp/commit/696fdec922661d4a3cc528fc34bc24fae8d4ad8ahttps://github.com/erlang/otp/pull/10706https://github.com/erlang/otp/security/advisories/GHSA-hmrc-prh3-rpvphttps://osv.dev/vulnerability/EEF-CVE-2026-21620https://www.erlang.org/doc/system/versions.html#order-of-versions