CVE-2025-21574 Denial of service in MySQL Cluster

Medium 6.5 Published 15 Apr 2025 Updated 3 Nov 2025

A low-privileged attacker can cause a complete denial of service in MySQL Server via network access, requiring a patch to restore availability.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2025-21574?

CVE-2025-21574 is a medium-severity denial of service vulnerability in Oracle Mysql Cluster, published on 15 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Parser). Supported versions that are affected are 8.0.0-8.0.41, 8.4.0-8.4.4 and 9.0.0-9.2.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-400

Which versions are affected by CVE-2025-21574?

It affects 2 products.

Products include Oracle Mysql Cluster, Oracle Mysql Server.

How do I fix CVE-2025-21574?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-21574 being exploited?

There is no known exploitation of CVE-2025-21574 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Oracle Mysql Cluster vulnerabilities

Sources

Also known as AZL-62095, AZL-62148, CLEANSTART-2026-SM74039, GHSA-mx69-4qpq-mvf3, MINI-cv3r-6233-fmfh, MINI-h4cw-wv2q-mggc and 2 more.