Vulnerability-Lookup

GHSA-W374-9VQX-5HR2

Vulnerability from github – Published: 2026-07-31 00:30 – Updated: 2026-07-31 00:30

Details

The RCU II+ and Multiload II+ are vulnerable to an unauthenticated service that exposes a debug interface granting full root-level access to the embedded system. This vulnerability stems from a network-accessible port running a Target Communications Framework (TCF) service that does not require any authentication, allowing an attacker to directly interact with the Linux environment that powers the device. Once connected, an attacker can freely view and modify the filesystem, manipulate running processes, and control network interfaces, enabling deep alteration of system behavior.

Severity

8.8 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-12562"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-30T22:16:53Z",
    "severity": "HIGH"
  },
  "details": "The RCU II+ and Multiload II+ are vulnerable to an unauthenticated \nservice that exposes a debug interface granting full root-level access \nto the embedded system. This vulnerability stems from a \nnetwork-accessible port running a Target Communications Framework (TCF) \nservice that does not require any authentication, allowing an attacker \nto directly interact with the Linux environment that powers the device. \nOnce connected, an attacker can freely view and modify the filesystem, \nmanipulate running processes, and control network interfaces, enabling \ndeep alteration of system behavior.",
  "id": "GHSA-w374-9vqx-5hr2",
  "modified": "2026-07-31T00:30:21Z",
  "published": "2026-07-31T00:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12562"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-03.json"
    },
    {
      "type": "WEB",
      "url": "https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+"
    },
    {
      "type": "WEB",
      "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf"
    },
    {
      "type": "WEB",
      "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz"
    },
    {
      "type": "WEB",
      "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-03"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/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-2026-12562 (GCVE-0-2026-12562)

Vulnerability from cvelistv5 – Published: 2026-07-30 21:29 – Updated: 2026-07-31 15:39

Title

Toptech Systems RCU II+ and Multiload II+ Missing Authentication for Critical Function

Summary

Severity

8.8 (High)


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

8.7 (High)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-306

Assigner

icscert

References

6 references

URL	Tags
https://s3.amazonaws.com/docs.toptech.com/nonpubl…
https://s3.amazonaws.com/docs.toptech.com/nonpubl…
https://s3.amazonaws.com/docs.toptech.com/index.h…
https://s3.amazonaws.com/docs.toptech.com/nonpubl…
https://www.cisa.gov/news-events/ics-advisories/i…
https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

2 products

Vendor	Product	Version
Toptech Systems	RCU II+	Affected: 0 , < 2025-11-24 (custom)
Toptech Systems	Multiload II+	Affected: 0 , < 2025-11-24 (custom)

Credits

Donald Green of Southwest Research Institute reported this vulnerability to CISA.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-12562",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-31T15:39:39.902412Z",
                "version": "2.0.3"
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          "product": "RCU II+",
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              "status": "affected",
              "version": "0",
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        {
          "defaultStatus": "unaffected",
          "product": "Multiload II+",
          "vendor": "Toptech Systems",
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              "lessThan": "2025-11-24",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
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            "vulnAvailabilityImpact": "HIGH",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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              "lang": "en",
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      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2026-07-30T23:58:13.132Z",
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      "references": [
        {
          "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip"
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        {
          "url": "https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz"
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          "url": "https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/"
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              "value": "\u003cdiv\u003eToptech Systems provides two methods for remediating affected RCU II+ \nand Multiload II+ units: First, move the device to a closed or segmented\n network without untrusted access.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eRun one of the RCU II+/Multiload II+ Vulnerability Removal Tools (VRT)\n available at \n\u003ca href=\"https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip\"\u003ehttps://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.zip\u003c/a\u003e,\n\u003ca href=\"https://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz\"\u003e \nhttps://s3.amazonaws.com/docs.toptech.com/nonpublic/rcuiip_mliip_vrt.gz\u003c/a\u003e.\n \u003c/div\u003e\u003cul\u003e\u003cli\u003eThis option does not require breaking Weights and Measures seals and has the least operational impact.\u003c/li\u003e\u003c/ul\u003eInstall the latest firmware from \n\u003ca href=\"https://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/\"\u003ehttps://s3.amazonaws.com/docs.toptech.com/index.html#downloads/Firmware/RCUII+_MLII+_SMPII+/\u003c/a\u003e.\n \u003cul\u003e\u003cli\u003eThis method requires stopping the bay and breaking the W\u0026amp;M seal. \nBe sure to back up the current ML configuration before performing the \nfirmware update.\u003c/li\u003e\u003c/ul\u003e\u003cdiv\u003e\nFor questions, contact Toptech Systems Support at security@toptech.com. \nAdditional details are available in Toptech System\u0027s firmware \nvulnerability notice: \n\u003ca href=\"https://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf\"\u003ehttps://s3.amazonaws.com/docs.toptech.com/nonpublic/2025%2012%2001%20RCU%20IIPlus%20MultiLoad%20IIPlus%20Vulnerability%20Notice.pdf\u003c/a\u003e.\n\n\u003c/div\u003e"
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    "datePublished": "2026-07-30T21:29:35.378Z",
    "dateReserved": "2026-06-17T20:31:31.583Z",
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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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-W374-9VQX-5HR2

CVE-2026-12562 (GCVE-0-2026-12562)

Tags

Sightings

Nomenclature