CVE-2026-21620
February 20, 2026
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 17.0, from 07b8f441ca711f9812fad9e9115bab3c3aa92f79; otp: from 5.10 before 7.0; otp: from 1.0.
Affected Packages
https://github.com/erlang/otp.git (GITHUB):
Affected version(s) >=OTP-27.3 <OTP-27.3.4.8Fix Suggestion:
Update to version OTP-27.3.4.8https://github.com/erlang/otp.git (GITHUB):
Affected version(s) >=OTP-28.3 <OTP-28.3.2Fix Suggestion:
Update to version OTP-28.3.2https://github.com/erlang/otp.git (GITHUB):
Affected version(s) >=OTP-17.0 <OTP-26.2.5.17Fix Suggestion:
Update to version OTP-26.2.5.17Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Relative Path Traversal
EPSS
Base Score:
0.06
