CVE-2026-18265 (GCVE-0-2026-18265)

Vulnerability from cvelistv5 – Published: 2026-08-20 16:13 – Updated: 2026-08-20 16:13
VLAI
Title
OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability
Summary
OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of OSNEXUS QuantaStor. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of Kapacitor. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-30036.
Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Vendor Product Version CPE status
OSNEXUS QuantaStor Affected: 6.7.3.010+9c965a6414
guessed Create a notification for this product.
Date Public
2026-07-29 21:43
Show details on NVD website
To clipboard 

{
  "containers": {
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        {
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          "vendor": "OSNEXUS",
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            {
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              "version": "6.7.3.010+9c965a6414"
            }
          ]
        }
      ],
      "dateAssigned": "2026-07-29T17:00:40.067Z",
      "datePublic": "2026-07-29T21:43:02.733Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of OSNEXUS QuantaStor. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the configuration of Kapacitor. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-30036."
        }
      ],
      "metrics": [
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            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-20T16:13:34.177Z",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "name": "ZDI-26-480",
          "tags": [
            "x_research-advisory"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-26-480/"
        }
      ],
      "source": {
        "lang": "en",
        "value": "Anonymous"
      },
      "title": "OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "zdi",
    "cveId": "CVE-2026-18265",
    "datePublished": "2026-08-20T16:13:34.177Z",
    "dateReserved": "2026-07-29T17:00:40.040Z",
    "dateUpdated": "2026-08-20T16:13:34.177Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-18265",
      "date": "2026-08-23",
      "epss": "0.01037",
      "percentile": "0.60829"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-18265\",\"sourceIdentifier\":\"zdi-disclosures@trendmicro.com\",\"published\":\"2026-08-20T17:17:23.017\",\"lastModified\":\"2026-08-20T17:17:23.017\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"OSNEXUS QuantaStor Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of OSNEXUS QuantaStor. Authentication is not required to exploit this vulnerability.\\n\\nThe specific flaw exists within the configuration of Kapacitor. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-30036.\"}],\"affected\":[{\"source\":\"zdi-disclosures@trendmicro.com\",\"affectedData\":[{\"vendor\":\"OSNEXUS\",\"product\":\"QuantaStor\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"6.7.3.010+9c965a6414\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"zdi-disclosures@trendmicro.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"zdi-disclosures@trendmicro.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-306\"}]}],\"references\":[{\"url\":\"https://www.zerodayinitiative.com/advisories/ZDI-26-480/\",\"source\":\"zdi-disclosures@trendmicro.com\"}]}}"
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.
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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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