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CVE Record

CVE-2021-2002: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Replication).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Replication). Supported versions that are affected are 8.0.22 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-2021-2002 is a denial-of-service issue in Oracle MySQL Server replication. A highly privileged network attacker could make affected MySQL servers hang or repeatedly crash, disrupting database availability. The published scope is MySQL Server 8.0.22 and earlier.

Executive priority

Treat this as a moderate availability risk. Prioritize patching production databases that run MySQL 8.0.22 or earlier and are accessible to many privileged operators or systems. It is less urgent than unauthenticated remote code execution but still matters for uptime-sensitive services.

Technical view

Oracle describes the flaw in MySQL Server, component Server: Replication. It is network reachable, low complexity, requires high privileges, no user interaction, and affects availability only. CVSS 3.1 is 4.9 with vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Likely exposure

Exposure is most relevant where MySQL Server 8.0.22 or earlier is reachable by highly privileged users over network protocols. Internet exposure is not enough by itself; the attacker needs high privileges. Systems using vendor-packaged MySQL or bundled MySQL in appliances should be checked.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The issue is described as easily exploitable after high-privilege access is obtained. Business impact is service interruption, not data theft or unauthorized modification based on the provided CVSS details.

Researcher notes

No CWE is listed in the supplied data. The affected component is replication, but the bundle does not provide root-cause detail, proof-of-concept status, or exact fixed release. Avoid assuming exploit maturity; validate through vendor advisories and package changelogs.

Mitigation direction

  • Apply Oracle MySQL security updates from the January 2021 CPU or later vendor guidance.
  • Upgrade affected MySQL Server deployments beyond 8.0.22 where vendor-supported packages are available.
  • Apply Fedora, Gentoo, NetApp, or other distributor updates where they supply MySQL builds.
  • Restrict network access to MySQL management and replication interfaces to trusted hosts.
  • Review and minimize highly privileged MySQL accounts and operational access paths.

Validation and detection

  • Inventory all MySQL Server instances and record exact versions.
  • Flag MySQL Server 8.0.22 and earlier as affected pending vendor confirmation.
  • Confirm installed packages include the relevant Oracle or distributor security update.
  • Check whether MySQL is exposed to untrusted networks or broad internal segments.
  • Review logs for unexplained MySQL hangs, restarts, or repeatable crashes.
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-2021-2002 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
6Source 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-2021-2002Attack 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 Server8.0.22 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.