How severe is CVE-2024-21126?

CVE-2024-21126 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2024-21126 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21126?

CVE-2024-21126 affects Oracle Database Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21126?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-21126 have an EU (EUVD) identifier?

Yes. CVE-2024-21126 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18840.

When was CVE-2024-21126 published?

CVE-2024-21126 was published on 2024-07-16 and last updated on 2026-06-17.

CVE-2024-21126

CVE-2024-21126 is a medium-severity vulnerability in Oracle Database Server with a CVSS 3.x base score of 5.8. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-18840
Weakness: CWE-400
Affected product: Oracle Database Server
Published: 2024-07-16
Last modified: 2026-06-17

Description

Vulnerability in the Oracle Database Portable Clusterware component of Oracle Database Server. Supported versions that are affected are 19.3-19.23 and 21.3-21.14. Easily exploitable vulnerability allows unauthenticated attacker with network access via DNS to compromise Oracle Database Portable Clusterware. While the vulnerability is in Oracle Database Portable Clusterware, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Database Portable Clusterware. CVSS 3.1 Base Score 5.8 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L).

Frequently asked questions

What is CVE-2024-21126?: Vulnerability in the Oracle Database Portable Clusterware component of Oracle Database Server. Supported versions that are affected are 19.3-19.23 and 21.3-21.14. Easily exploitable vulnerability allows unauthenticated attacker with network access via DNS to compromise Oracle Database Portable Clusterware. While the vulnerability is in Oracle Database Portable Clusterware, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Database Portable Clusterware. CVSS 3.1 Base Score 5.8 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L).
How severe is CVE-2024-21126?: CVE-2024-21126 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2024-21126 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21126?: CVE-2024-21126 affects Oracle Database Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21126?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21126 have an EU (EUVD) identifier?: Yes. CVE-2024-21126 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18840.
When was CVE-2024-21126 published?: CVE-2024-21126 was published on 2024-07-16 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpujul2024.html

Affected products (1)

cpe:2.3:a:oracle:database_server:*:*:*:*:*:*:*:*

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