CVE-2026-21620

LowCVSS 2.3/10Last modified Nov 11, 2026

Description

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 26.2.5.17, OTP 27.3.4.8, and OTP 28.3.2, corresponding to inets from 5.10 before 7.0, and tftp from 1.0 before 1.1.1.1, 1.2.2.1, and 1.2.4.

Metrics

CVSS 4.0 2.3/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness enumeration

CWE-23

Affected software

Vendor	Product	Versions
Erlang	OTP	>= 17.0, < ; >= 07b8f441ca711f9812fad9e9115bab3c3aa92f79, <
Erlang	OTP	>= 5.10, < 7.0
Erlang	OTP	>= 1.0, < *

References

Timeline

Published: Feb 20, 2026
Last modified: Nov 11, 2026
NVD status: Deferred

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