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

Show details on source website

JSON

To clipboard

{
  "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: 2026-03-17 16:09

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

CWE

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

Assigner

VulnCheck

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

Vendor

Product

Version

Perle Systems

IOLAN STS

Affected: 0 , < 6.0 (semver)

Perle Systems

IOLAN SCS

Affected: 0 , < 6.0 (semver)

Credits

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

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23759",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-17T16:09:03.805747Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-17T16:09:08.925Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "IOLAN STS",
          "vendor": "Perle Systems",
          "versions": [
            {
              "lessThan": "6.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "IOLAN SCS",
          "vendor": "Perle Systems",
          "versions": [
            {
              "lessThan": "6.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Victor A. Morales, Senior Pentester Team Leader, GM Sectec, Corp."
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Omar Crespo, Pentester, GM Sectec, Corp."
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulnCheck"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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."
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-17T15:20:34.202Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "product"
          ],
          "url": "https://www.perle.com/downloads/server_sds_sts_rackmount.shtml"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.perle.com/support_services/documentation_pdfs/iolan_scs-sds-sts_ug.pdf"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/perle-iolan-sts-scs-authenticated-command-injection-via-shell-ps"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cspan\u003eThe vendor has stated that the IOLAN SCG and SCR models do not contain this vulnerable functionality.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "The vendor has stated that the IOLAN SCG and SCR models do not contain this vulnerable functionality."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Perle IOLAN STS/SCS Authenticated Command Injection via \u0027shell ps\u0027",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-23759",
    "datePublished": "2026-03-17T15:20:10.743Z",
    "dateReserved": "2026-01-15T18:42:20.938Z",
    "dateUpdated": "2026-03-17T16:09:08.925Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-RCW4-CMHR-GGX7

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

Tags

Sightings

Nomenclature