Wiz
Vulnerability DatabaseCVE-2021-35647

CVE-2021-35647: 
MySQL vulnerability analysis and mitigation

Overview

A vulnerability in MySQL Server versions 8.0.26 and prior allows high privileged attackers with network access to compromise MySQL through multiple protocols. The vulnerability was disclosed in October 2021 as part of Oracle's Critical Patch Update (Oracle CPU).

Technical details

The vulnerability affects the MySQL Server Optimizer component and requires high privileges for exploitation. It has been assigned a CVSS v3.1 base score of 4.9 (MEDIUM) with the vector AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H, indicating that it requires network access and high privileges but no user interaction for exploitation (NVD, RedHat).

Impact

Successful exploitation of this vulnerability could allow an attacker to cause a denial of service condition in MySQL Server, potentially leading to system unavailability. The vulnerability specifically affects the Optimizer component and could result in unauthorized access or service disruption (NetApp Advisory).

Mitigation and workarounds

Oracle has released patches to address this vulnerability in MySQL Server version 8.0.27. Users are strongly recommended to update to the latest version to protect against this and other security issues. The fix is included in Oracle's October 2021 Critical Patch Update (Ubuntu Notice).

Additional resources

Source: This report was generated using AI

Related MySQL vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-53054MEDIUM5.5
  • MySQLMySQL
  • mysql:8.4::mecab-ipadic
NoYesOct 21, 2025
CVE-2025-53053MEDIUM5.5
  • MySQLMySQL
  • mecab-ipadic
NoYesOct 21, 2025
CVE-2025-53069MEDIUM4.9
  • MySQLMySQL
  • mysql:8.4::mysql-libs
NoYesOct 21, 2025
CVE-2025-53067MEDIUM4.9
  • MySQLMySQL
  • cpe:2.3:a:oracle:mysql_server
NoYesOct 21, 2025
CVE-2025-53062MEDIUM4.9
  • MySQLMySQL
  • mysql-server
NoYesOct 21, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo