CVE-2026-23759
8.6
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Perle Systems | IOLAN STS | 0 < 6.0 | affected |
| Perle Systems | IOLAN SCS | 0 < 6.0 | affected |
Weaknesses
- CWE-78: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://www.perle.com/downloads/server_sds_sts_rackmount.shtml
- https://www.perle.com/support_services/documentation_pdfs/iolan_scs-sds-sts_ug.pdf
- https://www.vulncheck.com/advisories/perle-iolan-sts-scs-authenticated-command-injection-via-shell-ps
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