Vulnerability Description
Perle IOLAN STS/SCS terminal server models with firmware versions prior to 6.0 allow authenticated OS command injection via the restricted shell accessed over Telnet or SSH. The shell 'ps' command does not perform proper argument sanitization and passes user-supplied parameters into an 'sh -c' invocation running as root. An authenticated attacker who can log in to the device can inject shell metacharacters after the 'ps' subcommand to execute arbitrary OS commands with root privileges, leading to full compromise of the underlying operating system.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://www.perle.com/downloads/server_sds_sts_rackmount.shtml
- https://www.perle.com/support_services/documentation_pdfs/iolan_scs-sds-sts_ug.p
- https://www.vulncheck.com/advisories/perle-iolan-sts-scs-authenticated-command-i
FAQ
What is CVE-2026-23759?
CVE-2026-23759 is a vulnerability with a CVSS score of 7.2 (HIGH). Perle IOLAN STS/SCS terminal server models with firmware versions prior to 6.0 allow authenticated OS command injection via the restricted shell accessed over Telnet or SSH. The shell 'ps' command doe...
How severe is CVE-2026-23759?
CVE-2026-23759 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23759?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.