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CVE-2024-21166VulnerabilityPublished Updated

CVE-2024-21166: Oracle MySQL Server · Difficult to exploit vulnerability allows high privileged attacker with network access via multiple

Affects Oracle MySQL ServerSource CVE Database V5

0

Not known to be exploited · CVSS 5.9 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Jul 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
Oracle Corporation MySQL ServerAffected
  • *
Fixed in–

AI-suggested

European organizations should implement the following specific mitigations: 1) Restrict network access to MySQL Server instances to trusted administrators and internal networks only, using firewalls and network segmentation to minimize exposure. 2) Enforce the principle of least privilege by limiting administrative and high privileged user accounts to only those necessary for operational tasks. 3) Monitor and audit MySQL administrative activities and network access logs to detect unusual or unauthorized actions promptly. 4) Apply security hardening best practices for MySQL, including disabling unused protocols and services that could provide network access vectors. 5) Stay alert for official Oracle patches or updates addressing CVE-2024-21166 and prioritize timely deployment once available. 6) Consider deploying Web Application Firewalls (WAFs) or Intrusion Detection/Prevention Systems (IDS/IPS) capable of detecting anomalous MySQL traffic patterns. 7) Conduct regular security assessments and penetration testing focusing on database security controls to identify potential privilege escalation paths.

Description

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.36 and prior and 8.3.0 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all MySQL Server accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 5.9 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H).

References

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