cve-2026-83271

HIGH CVSS 8.8 opencve
Description

Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Timeline
Published
2026-09-15 20:18 UTC
Last Modified
2026-09-17
CVSS Details

CVSS details not available.

Affected Products

No product information available.

Weaknesses (CWE)
CWE-269 CWE-284
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H mitre
3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H nvd
3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H opencve
References

No references available.

Linked Vulnerabilities

No linked vulnerabilities found.

{
  "cve": "CVE-2026-83271",
  "enrichment": {
    "affected": [
      {
        "configurations": [
          {
            "platform": null,
            "status": "affected",
            "versions": null
          }
        ],
        "enrichment": {
          "confidence": 95.0,
          "confidence_source": "inferred",
          "scores": [
            {
              "score": 95.0,
              "source": "inferred"
            },
            {
              "score": 100.0,
              "source": "matching"
            }
          ]
        },
        "product": "database_-_rdbms",
        "vendor": "oracle"
      },
      {
        "configurations": [
          {
            "platform": null,
            "status": "affected",
            "versions": {
              "scheme": "generic",
              "value": "[19.3,19.32]"
            }
          },
          {
            "platform": null,
            "status": "affected",
            "versions": {
              "scheme": "generic",
              "value": "[21.3,21.23]"
            }
          },
          {
            "platform": null,
            "status": "affected",
            "versions": {
              "scheme": "semver",
              "value": "[23.4.0,23.26.3]"
            }
          }
        ],
        "enrichment": {
          "confidence": 100.0,
          "confidence_source": "matching",
          "scores": [
            {
              "score": 100.0,
              "source": "matching"
            }
          ]
        },
        "original": {
          "product": "Oracle Database Server",
          "source": "cna",
          "vendor": "Oracle Corporation"
        },
        "product": "oracle_database_server",
        "vendor": "oracle_corporation"
      }
    ],
    "created": "2026-09-16T04:30:11.180971+00:00",
    "title": "Low-Privilege RDBMS Takeover via DBMS_REDEFINITION Execute",
    "updated": "2026-09-20T08:30:16.971540+00:00",
    "vendors": [
      "oracle",
      "oracle$PRODUCT$database_-_rdbms",
      "oracle_corporation",
      "oracle_corporation$PRODUCT$oracle_database_server"
    ]
  },
  "epss": {
    "score": 0.00417
  },
  "mitre": {
    "cpes": [
      "cpe:2.3:a:oracle:database_-_rdbms:*:*:*:*:*:*:*:*"
    ],
    "created": "2026-09-15T20:04:41.868000+00:00",
    "description": "Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION privilege with network access via Oracle Net to compromise RDBMS.  Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {
        "score": 8.8,
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
      },
      "cvssV4_0": {}
    },
    "mitre_repo_path": "cves/2026/83xxx/CVE-2026-83271.json",
    "references": [
      "https://www.oracle.com/security-alerts/cspusep2026.html"
    ],
    "title": null,
    "updated": "2026-09-17T13:10:39.003000+00:00",
    "vendors": [
      "oracle",
      "oracle$PRODUCT$database_-_rdbms"
    ],
    "weaknesses": []
  },
  "nvd": {
    "cpes": [],
    "created": "2026-09-15T20:18:39.517000+00:00",
    "description": "Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION privilege with network access via Oracle Net to compromise RDBMS.  Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {
        "score": 8.8,
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
      },
      "cvssV4_0": {}
    },
    "nvd_repo_path": "2026/CVE-2026-83271.json",
    "references": [
      "https://www.oracle.com/security-alerts/cspusep2026.html"
    ],
    "title": null,
    "updated": "2026-09-17T14:17:38.773000+00:00",
    "vendors": [],
    "weaknesses": [
      "CWE-269"
    ]
  },
  "opencve": {
    "changes": [
      {
        "created": "2026-09-15T20:15:00+00:00",
        "data": [
          {
            "details": {
              "new": "Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION privilege with network access via Oracle Net to compromise RDBMS.  Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).",
              "old": null
            },
            "type": "description"
          },
          {
            "details": [
              "oracle",
              "oracle$PRODUCT$database_-_rdbms"
            ],
            "type": "first_time"
          },
          {
            "details": {
              "added": [
                "cpe:2.3:a:oracle:database_-_rdbms:*:*:*:*:*:*:*:*"
              ],
              "removed": []
            },
            "type": "cpes"
          },
          {
            "details": {
              "added": [
                "oracle",
                "oracle$PRODUCT$database_-_rdbms"
              ],
              "removed": []
            },
            "type": "vendors"
          },
          {
            "details": {
              "added": [
                "https://www.oracle.com/security-alerts/cspusep2026.html"
              ],
              "removed": []
            },
            "type": "references"
          },
          {
            "details": {
              "added": {
                "cvssV3_1": {
                  "score": 8.8,
                  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
                }
              },
              "removed": {},
              "updated": {}
            },
            "type": "metrics"
          }
        ],
        "id": "ae5dacd0-dbe5-4edc-8d6c-0fdc3886c9c6"
      },
      {
        "created": "2026-09-16T04:45:00+00:00",
        "data": [
          {
            "details": [
              "oracle_corporation",
              "oracle_corporation$PRODUCT$oracle_database_server"
            ],
            "type": "first_time"
          },
          {
            "details": {
              "added": [
                "oracle_corporation",
                "oracle_corporation$PRODUCT$oracle_database_server"
              ],
              "removed": []
            },
            "type": "vendors"
          }
        ],
        "id": "a8efa9d9-8743-488b-a4cd-1973c7b13a1b"
      },
      {
        "created": "2026-09-16T20:15:00+00:00",
        "data": [
          {
            "details": {
              "new": "Low‑Privilege Exploit via Oracle Net Allows RDBMS Takeover",
              "old": null
            },
            "type": "title"
          },
          {
            "details": {
              "added": [
                "CWE-269",
                "CWE-284"
              ],
              "removed": []
            },
            "type": "weaknesses"
          }
        ],
        "id": "aa78ac61-b101-4c67-bebd-639771720a8c"
      },
      {
        "created": "2026-09-17T14:30:00+00:00",
        "data": [
          {
            "details": {
              "added": {
                "ssvc": {
                  "options": {
                    "Automatable": "no",
                    "Exploitation": "none",
                    "Technical Impact": "total"
                  },
                  "version": "2.0.3"
                }
              },
              "removed": {},
              "updated": {}
            },
            "type": "metrics"
          }
        ],
        "id": "0fff52cf-03d8-4843-ad8f-55956fa9ba6d"
      },
      {
        "created": "2026-09-18T21:30:00+00:00",
        "data": [
          {
            "details": {
              "new": null,
              "old": "Low‑Privilege Exploit via Oracle Net Allows RDBMS Takeover"
            },
            "type": "title"
          },
          {
            "details": {
              "added": [],
              "removed": [
                "CWE-284"
              ]
            },
            "type": "weaknesses"
          }
        ],
        "id": "e60ff4ab-611a-46fe-b9d0-cbd16bd96a35"
      },
      {
        "created": "2026-09-20T08:45:00+00:00",
        "data": [
          {
            "details": {
              "new": "Low-Privilege RDBMS Takeover via DBMS_REDEFINITION Execute",
              "old": null
            },
            "type": "title"
          }
        ],
        "id": "94558f42-0ae3-48b8-84ff-fe8d442f475e"
      }
    ],
    "cpes": {
      "data": [
        "cpe:2.3:a:oracle:database_-_rdbms:*:*:*:*:*:*:*:*"
      ],
      "providers": [
        "mitre"
      ]
    },
    "created": {
      "data": "2026-09-15T20:04:41.868000+00:00",
      "provider": "mitre"
    },
    "description": {
      "data": "Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION privilege with network access via Oracle Net to compromise RDBMS.  Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).",
      "provider": "mitre"
    },
    "metrics": {
      "cvssV2_0": {
        "data": {},
        "provider": null
      },
      "cvssV3_0": {
        "data": {},
        "provider": null
      },
      "cvssV3_1": {
        "data": {
          "score": 8.8,
          "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        },
        "provider": "mitre"
      },
      "cvssV4_0": {
        "data": {},
        "provider": null
      },
      "epss": {
        "data": {
          "score": 0.00417
        },
        "provider": "first"
      },
      "kev": {
        "data": {},
        "provider": null
      },
      "ssvc": {
        "data": {
          "options": {
            "Automatable": "no",
            "Exploitation": "none",
            "Technical Impact": "total"
          },
          "version": "2.0.3"
        },
        "provider": "vulnrichment"
      },
      "threat_severity": {
        "data": null,
        "provider": null
      }
    },
    "references": {
      "data": [
        "https://www.oracle.com/security-alerts/cspusep2026.html"
      ],
      "providers": [
        "mitre",
        "nvd"
      ]
    },
    "title": {
      "data": "Low-Privilege RDBMS Takeover via DBMS_REDEFINITION Execute",
      "provider": "enrichment"
    },
    "updated": {
      "data": "2026-09-20T08:30:16.971540+00:00",
      "provider": "enrichment"
    },
    "vendors": {
      "data": [
        "oracle",
        "oracle$PRODUCT$database_-_rdbms",
        "oracle_corporation",
        "oracle_corporation$PRODUCT$oracle_database_server"
      ],
      "providers": [
        "mitre",
        "enrichment"
      ]
    },
    "weaknesses": {
      "data": [
        "CWE-269"
      ],
      "providers": [
        "nvd",
        "vulnrichment"
      ]
    }
  },
  "vulnrichment": {
    "cpes": [],
    "created": "2026-09-15T20:04:41.868000+00:00",
    "description": "Vulnerability in the RDBMS component of Oracle Database Server.  Supported versions that are affected are 19.3-19.32, 21.3-21.23 and  23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Execute on DBMS_REDEFINITION privilege with network access via Oracle Net to compromise RDBMS.  Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {},
      "cvssV4_0": {},
      "kev": {},
      "ssvc": {
        "options": {
          "Automatable": "no",
          "Exploitation": "none",
          "Technical Impact": "total"
        },
        "version": "2.0.3"
      }
    },
    "references": [],
    "title": null,
    "updated": "2026-09-17T13:00:49.056000+00:00",
    "vendors": [],
    "vulnrichment_repo_path": "2026/83xxx/CVE-2026-83271.json",
    "weaknesses": [
      "CWE-269"
    ]
  }
}
Enrichment data
EPSS
View JSON Download
CISA KEV
View JSON Download
Aggregated bundle (all enrichments)
View JSON API Download bundle
View JSON API Download JSON