CVE-2026-83271High· 8.8▾ Twilight

Vulnerability in the RDBMS component of Oracle Database Server

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score48/ 100 · Moderate

impact 48.4 · likelihood 0.1 · exploitation 0

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Proof of concept

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Published

Sep 15, 2026

Updated

Sep 17, 2026

CVSS

8.8

Vendor

Oracle Corporation

Product

Oracle Database Server

CWE

CWE-269

Depth score

48 · Moderate

EPSS

0.42% · p36

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-09-17

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 17.

0.5% → 0.4%▼ 0.06%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 2 days

Sep 15, 2026Published
Disclosed via NVD
Sep 17, 2026Record revised
Last analysed / modified upstream
Sep 17, 2026EPSS first tracked
0.5%

Oracle Corporation CWE-269 #nvd #cve.org

Affected

oracle_database_server >= 19.3 <= 19.32
oracle_database_server >= 21.3 <= 21.23
oracle_database_server >= 23.4.0 <= 23.26.3

Full technical detail▾

Overview

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).

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

[email protected] — https://www.oracle.com/security-alerts/cspusep2026.html

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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