MrSteam iSteamX Improper Isolation or Compartmentalization

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  "cveMetadata": {
    "cveId": "CVE-2026-95699",
    "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
    "assignerShortName": "icscert",
    "dateUpdated": "2026-09-25T16:16:48.362Z",
    "dateReserved": "2026-09-22T14:36:39.739Z",
    "datePublished": "2026-09-24T20:39:59.975Z",
    "state": "PUBLISHED"
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        "dateUpdated": "2026-09-24T20:39:59.975Z"
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      "datePublic": "2026-09-24T16:17:00.000Z",
      "title": "MrSteam iSteamX Improper Isolation or Compartmentalization",
      "descriptions": [
        {
          "lang": "en",
          "value": "Prior to 9/18/2026, the iSteamX mobile application's AWS policy could grant authenticated users access to wildcard MQTT topics, which can expose other users' device data and allow the attacker to start and stop other connected users' devices. This risked exposing user profile information and potential scalding due to unintended device activation.",
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              "value": "<div><div>Prior to 9/18/2026, the iSteamX mobile application's AWS policy could grant authenticated users access to wildcard MQTT topics, which can expose other users' device data and allow the attacker to start and stop other connected users' devices. This risked exposing user profile information and potential scalding due to unintended device activation.</div></div>"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "MrSteam",
          "product": "iSteamX application",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v1.3.42 (build 44)",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "MrSteam",
          "product": "iSteamX Hub",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "v4.2.1",
              "status": "affected"
            }
          ]
        }
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          "descriptions": [
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              "lang": "en",
              "description": "CWE-653 Improper isolation or compartmentalization",
              "cweId": "CWE-653",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-267-01.json"
        },
        {
          "url": "https://www.mrsteam.com/contactus/"
        }
      ],
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH",
            "baseScore": 9.6,
            "baseSeverity": "CRITICAL"
          }
        }
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      "solutions": [
        {
          "lang": "en",
          "value": "The vendor has implemented countermeasures to mitigate this vulnerability and is in effect as of 9/18/2026. Affected users are encouraged to contact them for more information at ( https://www.mrsteam.com/contactus/ ).",
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              "value": "<div>The vendor has implemented countermeasures to mitigate this vulnerability and is in effect as of 9/18/2026. Affected users are encouraged to contact them for more information at (<span><a href=\"https://www.mrsteam.com/contactus/\">https://www.mrsteam.com/contactus/</a>)</span><span>.</span></div>"
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        {
          "lang": "en",
          "value": "Darren Challis",
          "type": "finder"
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