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CVE Record

CVE-2020-14773: 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 8.0.21 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. 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).

MediumCVSS 4.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw can let a highly privileged remote database user make affected MySQL Server instances hang or crash repeatedly. The business impact is service outage, not data theft or tampering based on the supplied CVSS data.

Executive priority

Treat as a moderate availability risk. Prioritize remediation for internet-reachable, production, or business-critical MySQL servers, especially where privileged database access is broadly distributed or weakly controlled.

Technical view

CVE-2020-14773 affects Oracle MySQL Server 8.0.21 and prior in the Server: Optimizer component. It is network-reachable, low-complexity, requires high privileges, needs no user interaction, and has availability-only impact with CVSS 3.1 score 4.9.

Likely exposure

Exposure is most relevant where MySQL Server 8.0.21 or earlier remains deployed and high-privileged database access is reachable over network protocols. Systems using vendor-packaged MySQL should be checked against Oracle, Fedora, Gentoo, and NetApp guidance as applicable.

Exploitation context

The CVE record says exploitation is easy but requires a high-privileged attacker with network access. The supplied sources do not show CISA KEV listing or active exploitation evidence, so active exploitation should not be assumed.

Researcher notes

The weakness is identified only as MySQL Server: Optimizer, with no CWE in the bundle. Impact is complete denial of service through hang or repeatable crash. No confidentiality or integrity impact is claimed in the supplied CVSS vector.

Mitigation direction

  • Upgrade MySQL Server using Oracle's October 2020 CPU guidance or later supported releases.
  • Apply relevant Fedora or Gentoo package updates where MySQL is distribution-managed.
  • Review NetApp advisory applicability for products bundling or depending on MySQL.
  • Restrict network access to MySQL management interfaces and trusted application paths.
  • Limit high-privileged database accounts to necessary administrators and services.

Validation and detection

  • Inventory MySQL Server instances and record exact versions.
  • Flag Oracle MySQL Server 8.0.21 and prior for remediation review.
  • Check package manager changelogs against the cited Fedora or Gentoo advisories.
  • Confirm privileged database accounts are limited and individually attributable.
  • Review monitoring for unexplained MySQL hangs, crashes, or restart loops.
Prepared
Confidence
high
Sources
8

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-2020-14773 mapping review

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

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/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
4.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.9Medium
CVSS 3.1 vector shape for CVE-2020-14773Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/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 Server8.0.21 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.