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1 vulnerability found for by LegacyUpdate

CVE-2026-97381 (GCVE-0-2026-97381)
Vulnerability from cvelistv5
Published
2026-10-13 21:08
Modified
2026-10-17 00:50
Severity ?
CWE
  • CWE-346 - Origin Validation Error
  • CWE-393 - Return of Wrong Status Code
Summary
Legacy Update is a tool for activating and installing updates on legacy Windows PCs. Legacy Update 1.12.0 through 1.13.1 contains an origin validation error in the IsPermitted method of its ActiveX control. After successfully reading the hosting document's hostname, a hostname that is not on the permitted list falls through without setting E_ACCESSDENIED, causing IsPermitted to return S_OK. An attacker who induces a user to visit a malicious webpage in Internet Explorer can invoke the control to enumerate update and system information, install updates without consent, display dialogs, or restart the computer when a reboot is pending. This issue was fixed in Legacy Update 1.13.2.
Impacted products
Vendor Product Version
LegacyUpdate LegacyUpdate Version: >= 1.12.0, < 1.13.2
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Show details on NVD website


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              "content": {
                "id": "CVE-2026-97381",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-17T00:50:30.998327Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-10-17T00:50:41.672Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "product": "LegacyUpdate",
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              "version": "\u003e= 1.12.0, \u003c 1.13.2"
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      "descriptions": [
        {
          "lang": "en",
          "value": "Legacy Update is a tool for activating and installing updates on legacy Windows PCs. Legacy Update 1.12.0 through 1.13.1 contains an origin validation error in the IsPermitted method of its ActiveX control. After successfully reading the hosting document\u0027s hostname, a hostname that is not on the permitted list falls through without setting E_ACCESSDENIED, causing IsPermitted to return S_OK. An attacker who induces a user to visit a malicious webpage in Internet Explorer can invoke the control to enumerate update and system information, install updates without consent, display dialogs, or restart the computer when a reboot is pending. This issue was fixed in Legacy Update 1.13.2."
        }
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      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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      "providerMetadata": {
        "dateUpdated": "2026-10-13T21:08:05.334Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/LegacyUpdate/LegacyUpdate/security/advisories/GHSA-f4g7-4gmx-jfgf",
          "tags": [
            "x_refsource_CONFIRM"
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          "url": "https://github.com/LegacyUpdate/LegacyUpdate/security/advisories/GHSA-f4g7-4gmx-jfgf"
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        {
          "name": "https://github.com/LegacyUpdate/LegacyUpdate/commit/7d62f0bfaa770d74cd6e2cb0bac9c1907df48033",
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          "url": "https://github.com/LegacyUpdate/LegacyUpdate/commit/7d62f0bfaa770d74cd6e2cb0bac9c1907df48033"
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        {
          "name": "https://github.com/LegacyUpdate/LegacyUpdate/commit/ae1c46c97f39a55a1937784d9f9beb30aa9147fd",
          "tags": [
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          "url": "https://github.com/LegacyUpdate/LegacyUpdate/commit/ae1c46c97f39a55a1937784d9f9beb30aa9147fd"
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          "name": "https://github.com/LegacyUpdate/LegacyUpdate/releases/tag/v1.13.2.0",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/LegacyUpdate/LegacyUpdate/releases/tag/v1.13.2.0"
        },
        {
          "name": "https://legacyupdate.net/news/2026/07/21/legacy-update-1-13-2",
          "tags": [
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          "url": "https://legacyupdate.net/news/2026/07/21/legacy-update-1-13-2"
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      "source": {
        "advisory": "GHSA-f4g7-4gmx-jfgf",
        "discovery": "UNKNOWN"
      },
      "title": "Legacy Update ActiveX control accepts unauthorized hosting origins"
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    "dateReserved": "2026-09-24T14:16:20.201Z",
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