// For flags

CVE-2026-21941

 

Severity Score

4.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. 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).

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Multiple
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2026-01-05 CVE Reserved
  • 2026-01-20 CVE Published
  • 2026-01-21 CVE Updated
  • 2026-01-26 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
References (1)
URL Tag Source
URL Date SRC
URL Date SRC
URL Date SRC
https://www.oracle.com/security-alerts/cpujan2026.html 2026-01-21
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Oracle Corporation
Search vendor "Oracle Corporation"
 MySQL Server
Search vendor "Oracle Corporation" for product "MySQL Server"
 >= 8.0.0 <= 8.0.44
Search vendor "Oracle Corporation" for product "MySQL Server" and version " >= 8.0.0 <= 8.0.44"
en
Affected
Oracle Corporation
Search vendor "Oracle Corporation"
 MySQL Server
Search vendor "Oracle Corporation" for product "MySQL Server"
 >= 8.4.0 <= 8.4.7
Search vendor "Oracle Corporation" for product "MySQL Server" and version " >= 8.4.0 <= 8.4.7"
en
Affected
Oracle Corporation
Search vendor "Oracle Corporation"
 MySQL Server
Search vendor "Oracle Corporation" for product "MySQL Server"
 >= 9.0.0 <= 9.5.0
Search vendor "Oracle Corporation" for product "MySQL Server" and version " >= 9.0.0 <= 9.5.0"
en
Affected