CVE-2024-21166Network attack vector

Data modification and service interruption

Published Jul 16, 2024 · Updated Nov 4, 2025

Improper authorization in MySQL Server 8.0.36 and earlier or 8.3.0 and earlier allows remote authenticated users to alter data or crash the server. Oracle has not disclosed the affected InnoDB code path or the operation that mishandles authorization. Exploitation requires high privileges, network access through the MySQL protocol, and high attack complexity; it can modify or delete data and cause a hang or repeatable crash, but does not disclose data.

CVSS severity5.9
Medium
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in MySQL Server 8.0.36 and earlier or 8.3.0 and earlier allows remote authenticated users to alter data or crash the server. Oracle has not disclosed the affected InnoDB code path or the operation that mishandles authorization. Exploitation requires high privileges, network access through the MySQL protocol, and high attack complexity; it can modify or delete data and cause a hang or repeatable crash, but does not disclose data.

The record

CVE
CVE-2024-21166
Published
Jul 16, 2024
Updated
Nov 4, 2025
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
CWE-285, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=8.0.36
  2. Affected versionversion=* <=8.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=* <=8.0.36; version=* <=8.3.0
Oracle · MySQL Serverversion=0 <=8.0.36; version=0 <=8.3.0

Published CVSS scores

5.9OracleCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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