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CVE Record

CVE-2020-14775: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 5.7.31 and prior and 8.0.21 and prior. 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).

MediumCVSS 6.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This MySQL Server flaw can let a low-privileged network user crash or hang the database. The main business risk is service outage, not data theft or data modification. Systems running MySQL 5.7.31 or earlier, or 8.0.21 or earlier, should be prioritized for vendor-guided updates.

Executive priority

Treat as a reliability risk for business-critical databases. It is not described as a data breach vulnerability, but affected production systems should be updated during the next practical maintenance window.

Technical view

CVE-2020-14775 affects Oracle MySQL Server InnoDB in supported versions 5.7.31 and prior, and 8.0.21 and prior. CVSS 3.1 is 6.5: network reachable, low complexity, low privileges required, no user interaction, availability-only high impact.

Likely exposure

Exposure is most likely where affected MySQL Server instances are reachable over network protocols by authenticated low-privileged users. Internet exposure is not required; internal application users, shared database environments, or compromised low-privilege credentials could matter.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The described outcome is denial of service through a hang or frequently repeatable crash, requiring low privileges and network access.

Researcher notes

The public bundle provides affected versions, CVSS, component, and denial-of-service impact. It does not include exploit detail, proof-of-concept status, or exact fixed version numbers beyond referenced vendor advisories.

Mitigation direction

  • Upgrade affected MySQL Server versions using Oracle October 2020 CPU guidance.
  • Apply relevant downstream package updates from Fedora, Gentoo, or other trusted distributors.
  • Check NetApp guidance if MySQL is embedded or bundled in NetApp-supported products.
  • Restrict network reachability to MySQL services to required hosts only.
  • Review low-privilege database accounts and remove unnecessary access.

Validation and detection

  • Inventory MySQL Server instances and record exact 5.7 or 8.0 versions.
  • Flag MySQL 5.7.31 and earlier, and 8.0.21 and earlier.
  • Confirm whether exposed instances use InnoDB workloads or default storage behavior.
  • Verify vendor or distribution security updates are installed.
  • Review database logs and monitoring for unexplained crashes or hangs.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-14775 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2020-14775Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationMySQL Server5.7.31 and prior, 8.0.21 and priorListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.