SB2026051934 - IBM PowerVC update for erlang otp

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026051934

SB2026051934 - IBM PowerVC update for erlang otp

Published: May 19, 2026

Security Bulletin ID SB2026051934
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Relative Path Traversal (CVE-ID: CVE-2026-21620)

CWE-ID: CWE-23 - Relative Path Traversal

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to read and write arbitrary files.

The vulnerability exists due to relative path traversal in the Erlang/OTP TFTP server when handling remote file requests with ../ path components while using the undocumented root_dir option. A remote user can send crafted file requests to read and write arbitrary files.

Exploitation requires that the system designer used the undocumented {root_dir,RootDir} option under incorrect assumptions and that the service is reachable from untrusted hosts.


Remediation

Install update from vendor's website.

References