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CVE Record

CVE-2021-2202: 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 5.7.32 and prior and 8.0.22 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 flaw lets an authenticated low-privilege user with network access crash or hang affected MySQL Server instances through the replication component. It is not described as data theft or code execution, but it can cause complete denial of service for applications that depend on MySQL.

Executive priority

Treat this as a reliability and availability risk, not a confidentiality breach based on current sources. Prioritize exposed or business-critical MySQL servers, especially where many users or services hold database credentials.

Technical view

CVE-2021-2202 affects Oracle MySQL Server Replication in supported versions 5.7.32 and prior, and 8.0.22 and prior. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, meaning network-reachable, low-complexity exploitation by a low-privileged user can repeatedly crash or hang the server.

Likely exposure

Exposure is most likely where affected MySQL versions are network-accessible to users or services with database credentials. Systems using MySQL replication features deserve focused review, but the source does not limit risk only to internet-facing deployments.

Exploitation context

The provided sources do not report active exploitation, and the CVE is not marked KEV. The issue is still operationally meaningful because a low-privileged authenticated attacker can cause complete service denial without user interaction.

Researcher notes

Evidence supports denial of service only: no confidentiality or integrity impact is listed. Sources do not provide exploit details, proof of concept status, or specific fixed build numbers in the supplied bundle, so remediation should follow vendor advisories.

Mitigation direction

  • Review Oracle April 2021 CPU guidance for the applicable MySQL Server update.
  • Upgrade affected MySQL Server 5.7.32-or-prior and 8.0.22-or-prior deployments.
  • Restrict MySQL network access to trusted application and administration sources.
  • Review low-privileged database accounts and remove unnecessary access.
  • Check NetApp guidance if MySQL is embedded or supplied through NetApp products.

Validation and detection

  • Inventory MySQL Server versions across production, staging, and managed appliances.
  • Identify instances running 5.7.32 or prior, or 8.0.22 or prior.
  • Confirm whether MySQL ports are reachable beyond trusted networks.
  • Review logs and monitoring for unexplained MySQL hangs, crashes, or restarts.
  • Verify vendor advisory status for any NetApp-affected deployments.
Prepared
Confidence
high
Sources
4

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-2021-2202 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
3Source 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-2021-2202Attack 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 Server5.7.32 and prior, 8.0.22 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.