CVE-2021-2356: Fedoraproject Fedora

Medium severity, CVSS 5.9. EPSS: 2.2% chance of exploitation in the next 30 days.

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are 5.7.34 and prior and 8.0.25 and prior. Difficult to exploit 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 as well as unauthorized update, insert or delete access to some of MySQL Server accessible data. CVSS 3.1 Base Score 5.9 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H).

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Netapp Oncommand Insight: affected versions not specified
• Oracle MySQL: from 5.0.0, up to and including 5.7.34; from 8.0.0, up to and including 8.0.25

Published 2021-07-21. Last modified 2026-06-17.