CVE-2025-53040Network attack vector

Authenticated hang or repeatable crash

Published Oct 21, 2025 · Updated Oct 22, 2025

Uncontrolled resource consumption in MySQL Server allows remote authenticated users to cause a hang or repeatable crash via MySQL Protocol. Oracle identifies the Server: Optimizer component but has not published the request shape or resource-consuming operation; affected releases are 8.0.0 through 8.0.43, 8.4.0 through 8.4.6, and 9.0.0 through 9.4.0. The attack requires a highly privileged account with network access and can interrupt availability without reported data disclosure or modification.

CVSS severity4.9
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in MySQL Server allows remote authenticated users to cause a hang or repeatable crash via MySQL Protocol. Oracle identifies the Server: Optimizer component but has not published the request shape or resource-consuming operation; affected releases are 8.0.0 through 8.0.43, 8.4.0 through 8.4.6, and 9.0.0 through 9.4.0. The attack requires a highly privileged account with network access and can interrupt availability without reported data disclosure or modification.

The record

CVE
CVE-2025-53040
Published
Oct 21, 2025
Updated
Oct 22, 2025
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
CWE-400, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=8.0.0 <=8.0.43
  2. Affected versionversion=8.4.0 <=8.4.6
  3. Affected versionversion=9.0.0 <=9.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.0 <=8.0.43; version=8.4.0 <=8.4.6; version=9.0.0 <=9.4.0

Published CVSS scores

4.9Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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