CVE-2026-83351
HighCVSS 8.1Summary
Vulnerability in the RDBMS component of Oracle Database Server affecting versions 23.4.0-23.26.3. A difficult to exploit flaw allows an unauthenticated attacker with network access via Oracle Net to compromise RDBMS.
Risk Assessment
A successful attack can result in takeover of RDBMS, impacting confidentiality, integrity and availability. Despite exploitation difficulty, the risk is high.
Recommendation
Immediately update Oracle Database Server to the version containing Oracle's fix. Restrict network access via Oracle Net and monitor for unusual activity.
Other vulnerabilities in Oracle Database Server
See all- CVE-2026-83348High
Vulnerability in the RDBMS component of Oracle Database Server affecting versions 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. An easily exploitable flaw allows a low-privileged attacker having Create DB Link privilege with network access via Oracle Net to compromise RDBMS.
- CVE-2026-83272High
Vulnerability in the Oracle Text component of Oracle Database Server affects versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. A low-privileged attacker with Create Index privilege and network access via Oracle Net can compromise Oracle Text. The vulnerability is difficult to exploit but may impact additional products (scope change).
- CVE-2026-83271High
Vulnerability in the RDBMS component of Oracle Database Server affects versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. A low-privileged attacker with Execute on DBMS_REDEFINITION privilege and network access via Oracle Net can compromise RDBMS. The vulnerability is easily exploitable.
- CVE-2026-83160High
Vulnerability in the RDBMS component of Oracle Database Server in versions 23.4.0-23.26.3. Easily exploitable, allows attacker with Create Table privilege via Oracle Net to take over RDBMS.
- CVE-2026-83156High
Vulnerability in the Oracle XML Developers Kit component of Oracle Database Server affecting versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. A low-privileged attacker with XDKC privilege and network access via Oracle Net can take over Oracle XML Developers Kit.
- CVE-2026-83088High
Vulnerability in the RDBMS component of Oracle Database Server. Affected versions are 23.4.0-23.26.3. Easily exploitable issue allows an attacker with Authenticated User privilege via Oracle Net to cause complete denial of service (hang or frequent crashes) in RDBMS, and attacks may impact additional products.
- CVE-2026-71064Critical
Vulnerability in the Portable Clusterware component of Oracle Database Server affects versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. An unauthenticated attacker with access to the physical communication segment can take over the component. CVSS score is 9.6.
- CVE-2026-71063Critical
Vulnerability in the Portable Clusterware component of Oracle Database Server affects versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. An unauthenticated attacker with access to the physical communication segment can take over the component. CVSS score is 9.6.
- CVE-2026-61211Critical
Vulnerability in the RDBMS component of Oracle Database Server (versions 19.3-19.31 and 23.4.0-23.26.2) allows a low-privileged attacker with network access via Oracle Net to compromise RDBMS. Attacks may impact additional products (scope change). CVSS 9.9.
- CVE-2026-46833Critical
Vulnerability in the Net Service component of Oracle Database Server versions 23.4.0-23.26.2. Difficult to exploit, allows unauthenticated attacker with network access via TLS to compromise Net Service. Attacks may impact additional products (scope change).
Original NVD description (English source)
Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Difficult to exploit vulnerability allows unauthenticated attacker 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 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).