Vulnerability-Lookup

CVE-2026-83349 (GCVE-0-2026-83349)

Vulnerability from cvelistv5 – Published: 2026-09-15 20:05 – Updated: 2026-09-15 23:14

Summary

Vulnerability in the Oracle Net Services 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 unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 23:12 UTC

CWE

Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services.
CWE-400 - Uncontrolled Resource Consumption

Assigner

oracle mitre root

References

1 reference

URL	Tags
https://www.oracle.com/security-alerts/cspusep2026.html	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Oracle Corporation	Oracle Database Server	Affected: 19.3 , ≤ 19.32 (custom) Affected: 21.3 , ≤ 21.23 (custom) Affected: 23.4.0 , ≤ 23.26.3 (custom) cpe:2.3:a:oracle:database_-_e_net_services:::::::: cpe:2.3:a:oracle:database_-_e_net_services:::::::: cpe:2.3:a:oracle:database_-_e_net_services::::::::

Show details on NVD website

JSON

To clipboard

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CERTFR-2026-AVI-1184

Vulnerability from certfr_avis - Published: 2026-09-16 - Updated: 2026-09-16

De multiples vulnérabilités ont été découvertes dans Oracle Database Server. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance et un déni de service à distance.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
Oracle	Database Server	Oracle Database Server versions 19.3 à 19.32
Oracle	Database Server	Oracle Database Server versions 23.4.0 à 23.26.3
Oracle	Database Server	Oracle Database Server versions 21.3 à 21.23

References

Title

Publication Time

FKIE_CVE-2026-83349

Vulnerability from fkie_nvd - Published: 2026-09-15 20:18 - Updated: 2026-09-16 19:42

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	secalert_us@oracle.com	https://www.oracle.com/security-alerts/cspusep2026.html

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Oracle Database Server",
          "vendor": "Oracle Corporation",
          "versions": [
            {
              "lessThanOrEqual": "19.32",
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              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "21.23",
              "status": "affected",
              "version": "21.3",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "23.26.3",
              "status": "affected",
              "version": "23.4.0",
              "versionType": "custom"
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          ]
        }
      ],
      "source": "secalert_us@oracle.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
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    }
  ],
  "id": "CVE-2026-83349",
  "lastModified": "2026-09-16T19:42:12.090",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
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        },
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        "impactScore": 3.6,
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        "type": "Secondary"
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    {
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}

GHSA-J7MC-C894-QW7H

Vulnerability from github – Published: 2026-09-15 21:32 – Updated: 2026-09-15 21:32

Details

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-83349"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-15T20:18:48Z",
    "severity": "HIGH"
  },
  "details": "Vulnerability in the Oracle Net Services 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 unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 7.5 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).",
  "id": "GHSA-j7mc-c894-qw7h",
  "modified": "2026-09-15T21:32:35Z",
  "published": "2026-09-15T21:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83349"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cspusep2026.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

NCSC-2026-0373

Vulnerability from csaf_ncscnl - Published: 2026-09-16 13:51 - Updated: 2026-09-16 13:51

Summary

Kwetsbaarheden verholpen in Oracle Database Producten

Scope

16 vulnerabilities in this advisory, including CVE-2026-83349.

CVE-2026-83349

A vulnerability in Oracle Net Services affecting Oracle Database Server versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3 allows unauthenticated network attackers to cause denial of service by hanging or crashing the service, with a CVSS 3.1 score of 7.5.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Known affected: 5 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-83349 (GCVE-0-2026-83349)

CERTFR-2026-AVI-1184

Solutions

FKIE_CVE-2026-83349

GHSA-J7MC-C894-QW7H

NCSC-2026-0373

Tags

Sightings

Nomenclature

Related by attack behaviour