What is CVE-2023-21949?

CVE-2023-21949 is a low-severity vulnerability in Oracle Database Server. CVSS score: 3.7/10. Published 2023-07-18.

How severe is CVE-2023-21949?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Oracle Database Server

CVE-2023-21949

Vulnerability in the Advanced Networking Option component of Oracle Database Server. Supported versions that are affected are 19.3-19.19 and 21.3-21.10. Difficult to exploit vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Advanced Networking Option. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Advanced Networking Option accessible data. CVSS 3.1 Base Score 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).

Published 2023-07-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Oracle Database Server
Oracle Corporation Advanced Networking Option — versions 19.3, 21.3

References

www.oracle.com/security-alerts/cpujul2023.html (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-21949?: CVE-2023-21949 is a low-severity vulnerability in Oracle Database Server. CVSS score: 3.7/10. Published 2023-07-18.
How severe is CVE-2023-21949?: Low severity. CVSS v3 base score is 3.7 out of 10.