{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "advisory",
          "vendor": "Security",
          "versions": [
            {
              "status": "affected",
              "version": "unknown"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "disclosure via Fulldisclosure"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "0day Rubbish Research Team is publicly disclosing 2 vulnerabilities in CIRCUTOR PowerStudio SCADA WAVE 24.11.6.0 \n(CIRCUTOR S.A.). The research is published and a proof-of-concept is available.\n\nVulnerability 1: Pre-authentication SYSTEM RCE (CVSS 9.8, pre-authentication)\n\nThe native engine PwrStudio.exe runs as the Windows service CircutorPowerStudioScadaServer under NT AUTHORITY\\SYSTEM. \nThe shared fail-open JWT library (see companion advisory) accepts a forged alg=none JWT with role=Admin. Combined with \na path-traversal write of a malicious default.xeve events configuration (containing a shellExecute action) against \nPSSWidgets (port 8105) and an HTTP engine restart against PSSAdministrator (port 8089), an unauthenticated attacker \nforces the engine to reload the configuration and fire XCEventActionShellExecute::Execute, which reaches CreateProcessW \nwith attacker-controlled arguments as SYSTEM. Under a strict default deployment where 8089 is loopback-only with no \nforwarding path, the chain does not close for a pure-remote unauthenticated attacker; once 8089 is reachable (reverse \nproxy, rebind, same-host, or same segment), it is a full unauthenticated remote SYSTEM RCE.\n\nImpact: Arbitrary command execution as NT AUTHORITY\\SYSTEM on the SCADA host; the attacker controls the SCADA engine, \nthe event configuration, and the underlying Windows host.\n\nAdvisory: https://0day-rubbish.com/blog/circutor-powerstudio-unauth-shellExecute-rce\n\nVulnerability 2: JWT forgery / authentication bypass (CVSS 8.6, pre-authentication)\n\nEvery .NET Core microservice registers JWT Bearer authentication via a shared extension method configured fail-open: a \ncustom SignatureValidator that always returns a non-null token without validating the signature, \nRequireSignedTokens=false, ValidateIssuerSigningKey=false, ValidateIssuer=false, ValidateAudience=false, and an \nOnAuthenticationFailed handler that silently swallows exceptions. Any attacker-crafted alg=none JWT with any role claim \nis accepted as a valid authenticated identity by every microservice\u0027s AdminSecure/UserSecure policy. No credentials, no \nsigning key, and no user account are required; only network reachability to the target microservice port. This is an \nauthentication-bypass/identity-forgery primitive that compromises the product\u0027s entire authentication trust root and is \nthe auth-bypass primitive that enables the companion shellExecute RCE chain.\n\nImpact: Impersonate any Admin/User role and call any protected endpoint: stop/start the SCADA engine or microservices \n(DoS), push configuration, upload/download/delete files, configure external communication, and manage licenses; no \ncredentials required.\n\nAdvisory: https://0day-rubbish.com/blog/circutor-powerstudio-jwt-alg-none-identity-forgery\n\nPoC and full analysis: https://github.com/Exploit-Garbage/0day-Rubbish\n\n-- \n0day Rubbish Research Team\nhttps://0day-rubbish.com\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives \u0026 RSS: https://seclists.org/fulldisclosure/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T11:37:11Z",
        "orgId": "4e2abfbf-4a2a-4b76-a4e0-d77c18ba156c",
        "shortName": "VULNARCHIVE"
      },
      "references": [
        {
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://vuln.freearchive.org/archive/full-disclosure/2026/Aug/8"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://seclists.org/fulldisclosure/2026/Aug/8"
        },
        {
          "url": "https://0day-rubbish.com"
        },
        {
          "url": "https://0day-rubbish.com/blog/circutor-powerstudio-jwt-alg-none-identity-forgery"
        },
        {
          "url": "https://0day-rubbish.com/blog/circutor-powerstudio-unauth-shellExecute-rce"
        },
        {
          "url": "https://github.com/Exploit-Garbage/0day-Rubbish"
        },
        {
          "url": "https://nmap.org/mailman/listinfo/fulldisclosure"
        },
        {
          "url": "https://seclists.org/fulldisclosure/"
        }
      ],
      "source": {
        "defect": [
          "https://seclists.org/fulldisclosure/2026/Aug/8"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Security advisory: multiple vulnerabilities including JWT forgery / authentication bypass, Pre-authentication SYSTEM RCE in CIRCUTOR PowerStudio SCADA WAVE 24.11.6.0 (CIRCUTOR S.A.)",
      "x_gcve": [
        {
          "recordType": "advisory",
          "relationships": [],
          "vulnId": "GCVE-1988-2026-0055",
          "x_vulnarchive": {
            "archiveUrl": "https://vuln.freearchive.org/archive/full-disclosure/2026/Aug/8",
            "automated": true,
            "contentSha256": "58e108022707975fd14683eff98ee10fc1c059144d9993ff6ca49b14208bced2",
            "evidenceScore": 9,
            "messageId": "",
            "originalUrl": "https://seclists.org/fulldisclosure/2026/Aug/8",
            "policy": "vulnarchive-1",
            "sourceFormat": "text/html",
            "sourcePublishedAt": "2026-08-03T03:35:52Z"
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  "cveMetadata": {
    "assignerOrgId": "4e2abfbf-4a2a-4b76-a4e0-d77c18ba156c",
    "assignerShortName": "VULNARCHIVE",
    "datePublished": "2026-09-07T13:20:21Z",
    "dateUpdated": "2026-09-11T11:37:11Z",
    "state": "PUBLISHED",
    "vulnId": "GCVE-1988-2026-0055"
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  "dataType": "CVE_RECORD",
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}