CVE-2021-2230

FAUCET Score

CVE-2021-2230 is a denial-of-service vulnerability affecting Oracle MySQL Server versions 8.0.23 and prior, specifically within the Optimizer component. A highly privileged attacker with network access can exploit this vulnerability to cause the MySQL Server to hang or repeatedly crash. With a CVSS 3.1 Base Score of 4.9 (Medium), it primarily impacts availability. There is currently no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 8.0.0, <= 8.0.23CPE matchmatch criteria	cpe:2.3:a:oracle:mysql::::::::
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:active_iq_unified_manager:-:::::windows::
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:oncommand_insight:-:::::::*
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:oncommand_workflow_automation:-:::::::*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.2

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

1.34%

Probability of exploitation in next 30 days

EPSS Percentile

68.4%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0134 is in the 75th percentile among its peer group of 3,566 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

microsoftpatch availablevia msrc

Product: CBL Mariner 1.0 ARMFixed in: 8.0.26-1

microsoftpatch availablevia msrc

Product: cm1 mysql 8.0.26-1 on CBL Mariner 1.0Fixed in: 8.0.26-1

microsoftpatch availablevia msrc

Product: CBL Mariner 1.0 x64Fixed in: 8.0.26-1

microsoftpatch availablevia msrc

Product: 19031-16820Fixed in: 8.0.26-1

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-mysql80-mysql-0:8.0.26-1.el7

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: mysql:8.0-8040020210824134700.522a0ee4

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-mysql80-mysql-0:8.0.26-1.el7

View patch

oraclevendor investigatingvia nvd_reference

View patch

Vendor Advisories (3)

microsoft2023-Mar/CVE-2021-2230

CVE-2021-2230

Mar 14, 2023

redhatCVE-2021-2230Moderate

mysql: Server: Optimizer unspecified vulnerability (CPU Apr 2021)

Apr 20, 2021

microsoft2021-Apr/CVE-2021-2230Moderate

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.23 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).

Apr 13, 2021

References

security.netapp.com / advisory/ntap-20210513-0002

Third Party Advisory

oracle.com / security-alerts/cpuapr2021.html

Vendor Advisory