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CVE Record

CVE-2020-14786: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: PS).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: PS). 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

CVE-2020-14786 can let a highly privileged network attacker crash or hang affected MySQL Server instances. The business impact is availability: applications relying on that database may experience outages. It is not described as data theft or data modification.

Executive priority

Treat as a scheduled but real availability fix. It is not marked as exploited and requires high privileges, but production databases are business-critical, so patch affected MySQL systems during the next maintenance window.

Technical view

Oracle describes a MySQL Server vulnerability in component Server: PS affecting supported versions 8.0.21 and prior. It is network reachable across multiple protocols, low complexity, requires high privileges, and has CVSS 3.1 score 4.9 with high availability impact only.

Likely exposure

Exposure is limited to environments running MySQL Server 8.0.21 or earlier where high-privileged database access is possible over reachable network paths. Internet exposure is not required, but broad internal administrative access increases risk.

Exploitation context

The source bundle does not show CISA KEV listing or cited active exploitation. Oracle says exploitation is easy once the attacker already has high privileges and network access, making this mainly an outage risk from privileged misuse or compromised admin credentials.

Researcher notes

Public details identify the affected component as Server: PS but do not provide CWE, root-cause detail, exploit indicators, or weaponized public exploitation. Keep analysis tied to availability impact and privileged network access until vendor evidence says more.

Mitigation direction

  • Apply Oracle or downstream vendor security updates for affected MySQL Server builds.
  • Move off MySQL Server 8.0.21 and prior where vendor guidance indicates exposure.
  • Restrict MySQL network access to trusted application and administration paths.
  • Review and reduce high-privileged MySQL accounts and shared credentials.
  • Monitor database crash, restart, and hang patterns after suspected privileged access.

Validation and detection

  • Inventory MySQL Server versions and flag 8.0.21 or earlier.
  • Confirm whether exposed instances accept network access over MySQL-supported protocols.
  • Review privileged MySQL accounts and recent authentication activity.
  • Verify Oracle, Fedora, Gentoo, or appliance vendor patches are applied.
  • Check outage logs for unexplained MySQL hangs or repeat crashes.
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-2020-14786 mapping review

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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-2020-14786Attack 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.