How severe is CVE-2023-21893?

CVE-2023-21893 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-21893 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21893?

CVE-2023-21893 primarily affects Oracle Database Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21893?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-21893 published?

CVE-2023-21893 was published on 2023-01-18 and last updated on 2026-06-17.

CVE-2023-21893

CVE-2023-21893 is a high-severity vulnerability in Oracle Database Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Oracle Database Server
Published: 2023-01-18
Last modified: 2026-06-17

Description

Vulnerability in the Oracle Data Provider for .NET component of Oracle Database Server. Supported versions that are affected are 19c and 21c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TCPS to compromise Oracle Data Provider for .NET. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Data Provider for .NET. Note: Applies also to Database client-only on Windows platform. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

Frequently asked questions

What is CVE-2023-21893?: Vulnerability in the Oracle Data Provider for .NET component of Oracle Database Server. Supported versions that are affected are 19c and 21c. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TCPS to compromise Oracle Data Provider for .NET. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Data Provider for .NET. Note: Applies also to Database client-only on Windows platform. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
How severe is CVE-2023-21893?: CVE-2023-21893 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-21893 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21893?: CVE-2023-21893 primarily affects Oracle Database Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-21893?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-21893 published?: CVE-2023-21893 was published on 2023-01-18 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpujan2023.html

Affected products (2)

cpe:2.3:a:oracle:database_server:19c:*:*:*:*:*:*:*
cpe:2.3:a:oracle:database_server:21c:*:*:*:*:*:*:*

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