LiveActive security incident?Get immediate response
CVE Record

CVE-2020-14760: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 5.7.31 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 as well as unauthorized update, insert or delete access to some of MySQL Server accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H).

MediumCVSS 5.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-14760 affects Oracle MySQL Server 5.7.31 and earlier. A highly privileged attacker who can reach MySQL over the network could crash the server repeatedly or modify some accessible data. Business urgency is moderate: compromise requires elevated database privileges, but successful abuse can disrupt availability and damage data integrity.

Executive priority

Treat as a moderate-priority database maintenance and hardening issue. It is less urgent than unauthenticated remote code execution, but database outages and integrity loss can still create operational and reporting risk.

Technical view

The flaw is in MySQL Server’s Optimizer component. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H, score 5.5. Impact is limited to integrity and availability: unauthorized update, insert, or delete access to some accessible data, plus complete denial of service through hangs or repeatable crashes.

Likely exposure

Organizations running Oracle MySQL Server 5.7.31 or earlier are the stated exposure. Risk is concentrated where privileged database accounts can connect over network-accessible MySQL protocols.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is described as easily exploitable, but only by a high-privileged attacker with network access.

Researcher notes

Evidence is limited to the CVE description and vendor advisory references. No CWE is listed in the bundle. Do not assume affected versions beyond MySQL Server 5.7.31 and prior, and do not claim exploitation without additional cited evidence.

Mitigation direction

  • Inventory MySQL Server versions and flag 5.7.31 or earlier.
  • Follow Oracle CPU October 2020 guidance for applicable updates.
  • Check NetApp or Gentoo advisories if those distributions or products are in scope.
  • Restrict network access to MySQL services to trusted systems.
  • Review and reduce high-privilege database accounts where possible.

Validation and detection

  • Confirm each MySQL instance version against the affected 5.7.31-and-prior range.
  • Verify vendor security updates are applied through Oracle or downstream package advisories.
  • Review privileged accounts allowed to connect over network protocols.
  • Check database logs for unexplained crashes, hangs, or unauthorized data changes.
Prepared
Confidence
high
Sources
5

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2020-14760 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/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
4Source 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
5.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H1.24.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2020-14760Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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