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NVD Vulnerability Details :

CVE-2026-21949

Analyzed

Source-secalert_us@oracle.com

Published At-20 Jan, 2026 | 22:15

Updated At-29 Jan, 2026 | 15:22

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 9.0.0-9.5.0. 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).

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Type: Secondary

Version: 3.1

Base score: 6.5

Base severity: MEDIUM

Vector:

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

CPE Matches

Oracle Corporation

>>mysql_server>>Versions from 9.0.0(inclusive) to 9.5.0(inclusive)

cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*

Weaknesses

CWE ID	Type	Source
CWE-400	Secondary	134c704f-9b21-4f2e-91b3-4a467353bcc0

CWE ID: CWE-400

Type: Secondary

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

References

Hyperlink	Source	Resource
https://www.oracle.com/security-alerts/cpujan2026.html	secalert_us@oracle.com	Vendor Advisory

Hyperlink: https://www.oracle.com/security-alerts/cpujan2026.html

Source: secalert_us@oracle.com

Resource:

Vendor Advisory

CISA Catalog

Metrics

CPE Matches

Weaknesses

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References

Change History