CVE-2026-102149 (GCVE-0-2026-102149)

Vulnerability from cvelistv5 – Published: 2026-09-30 20:09 – Updated: 2026-09-30 20:54
VLAI
Title
Kiteworks Email Protection Gateway Improper Access Control
Summary
Kiteworks Email Protection Gateway did not sufficiently restrict which account a certificate could be assigned to. This could allow an attacker to associate a certificate with another user's account, affecting the confidentiality and integrity of that account's encrypted mail and, where certificate-based login is enabled, potentially permitting unauthorized access to the account.
Severity
9.4 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Vendor Product Version CPE status
Kiteworks Email Protection Gateway Affected: 0 , < 9.5.1 (custom)
Unaffected: 9.5.1
guessed Create a notification for this product.
Date Public
2026-09-30 00:00
Show details on NVD website
To clipboard 

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          "product": "Email Protection Gateway",
          "vendor": "Kiteworks",
          "versions": [
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              "status": "affected",
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            },
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              "version": "9.5.1"
            }
          ]
        }
      ],
      "datePublic": "2026-09-30T00:00:00.000Z",
      "descriptions": [
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          "value": "Kiteworks Email Protection Gateway did not sufficiently restrict which account a certificate could be assigned to. This could allow an attacker to associate a certificate with another user\u0027s account, affecting the confidentiality and integrity of that account\u0027s encrypted mail and, where certificate-based login is enabled, potentially permitting unauthorized access to the account."
        }
      ],
      "metrics": [
        {
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            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-09-30T20:54:02.668Z",
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        },
        {
          "name": "url",
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      "title": "Kiteworks Email Protection Gateway Improper Access Control",
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  "cveMetadata": {
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    "assignerShortName": "cisa-cg",
    "cveId": "CVE-2026-102149",
    "datePublished": "2026-09-30T20:09:21.510Z",
    "dateReserved": "2026-09-28T17:39:13.564Z",
    "dateUpdated": "2026-09-30T20:54:02.668Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
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              {
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                "product": "Email Protection Gateway",
                "vendor": "Kiteworks",
                "versions": [
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                    "lessThan": "9.5.1",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
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          }
        ],
        "id": "CVE-2026-102149",
        "lastModified": "2026-10-01T02:17:43.350",
        "metrics": {
          "cvssMetricV31": [
            {
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                "version": "3.1"
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              "impactScore": 5.5,
              "source": "9119a7d8-5eab-497f-8521-727c672e3725",
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        "published": "2026-09-30T21:17:03.760",
        "references": [
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            "source": "9119a7d8-5eab-497f-8521-727c672e3725",
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        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
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            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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