PT-2026-25903 · Perle Systems · Iolan Scs+1

Vulncheck · Published 2026-03-17 · Updated 2026-03-17 · CVE-2026-23759

Mitre

CVSS v3.1

7.2

7.2

High

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-23759

Affected Products

Iolan Scs

Iolan Sts

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-23759 · Security Note
• https://perle.com/support_services/documentation_pdfs/iolan_scs-sds-sts_ug.pdf · Note
• https://vulncheck.com/advisories/perle-iolan-sts-scs-authenticated-command-injection-via-shell-ps · Note
• https://perle.com/downloads/server_sds_sts_rackmount.shtml · Note