CVE-2025-21536: Medium severity Oracle MySQL Server vulnerability
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.39 and prior, 8.4.2 and prior and 9.0.1 and prior. Easily exploitable vulnerability allows high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Oracle MySQL Server (component: Server: Optimizer)to a version that resolves this vulnerability.Fixed in 8.0.39 - Upgrade
Upgrade
Oracle MySQL Server (component: Server: Optimizer)to a version that resolves this vulnerability.Fixed in 8.4.2 - Upgrade
Upgrade
Oracle MySQL Server (component: Server: Optimizer)to a version that resolves this vulnerability.Fixed in 9.0.1
Event History
Frequently Asked Questions
What is the severity of CVE-2025-21536?
CVE-2025-21536 is classified as an easily exploitable vulnerability with significant impact, particularly for systems running affected versions of MySQL Server.
How do I fix CVE-2025-21536?
To fix CVE-2025-21536, upgrade your MySQL Server to a version newer than 8.0.39, 8.4.2, or 9.0.1.
Which versions of MySQL are affected by CVE-2025-21536?
CVE-2025-21536 affects MySQL Server versions 8.0.39 and prior, 8.4.2 and prior, and 9.0.1 and prior.
Can CVE-2025-21536 be exploited remotely?
Yes, CVE-2025-21536 can be exploited remotely by high privileged attackers with network access.
What component of MySQL Server is vulnerable in CVE-2025-21536?
CVE-2025-21536 specifically affects the Server: Optimizer component of MySQL Server.