Vulnerability-Lookup

GHSA-RCW4-CMHR-GGX7

Vulnerability from github – Published: 2026-03-17 18:30 – Updated: 2026-03-17 18:30

Details

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.

Severity

7.2 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

8.6 (High)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23759"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-17T16:16:20Z",
    "severity": "HIGH"
  },
  "details": "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 \u0027ps\u0027 command does not perform proper argument sanitization and passes user-supplied parameters into an \u0027sh -c\u0027 invocation running as root. An authenticated attacker who can log in to the device can inject shell metacharacters after the \u0027ps\u0027 subcommand to execute arbitrary OS commands with root privileges, leading to full compromise of the underlying operating system.",
  "id": "GHSA-rcw4-cmhr-ggx7",
  "modified": "2026-03-17T18:30:32Z",
  "published": "2026-03-17T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23759"
    },
    {
      "type": "WEB",
      "url": "https://www.perle.com/downloads/server_sds_sts_rackmount.shtml"
    },
    {
      "type": "WEB",
      "url": "https://www.perle.com/support_services/documentation_pdfs/iolan_scs-sds-sts_ug.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/perle-iolan-sts-scs-authenticated-command-injection-via-shell-ps"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-23759 (GCVE-0-2026-23759)

Vulnerability from cvelistv5 – Published: 2026-03-17 15:20 – Updated: 2026-05-14 02:09

Title

Perle IOLAN STS/SCS Authenticated Command Injection via 'shell ps'

Summary

Severity

8.6 (High)


                        
                          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

7.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-17 16:09 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://www.perle.com/downloads/server_sds_sts_ra…	product
https://www.perle.com/support_services/documentat…	product
https://www.vulncheck.com/advisories/perle-iolan-…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
Perle Systems	IOLAN STS	Affected: 0 , < 6.0 (custom)
Perle Systems	IOLAN SCS	Affected: 0 , < 6.0 (custom)

Credits

Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp. Omar Crespo, Pentester, GM Sectec, Corp. VulnCheck

Show details on NVD website

JSON

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  "containers": {
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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-23759",
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                  },
                  {
                    "Technical Impact": "total"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-03-17T16:09:03.805747Z",
                "version": "2.0.3"
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        },
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        },
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      "metrics": [
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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            }
          ],
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        }
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-RCW4-CMHR-GGX7

CVE-2026-23759 (GCVE-0-2026-23759)

Tags

Sightings

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Related by attack behaviour