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CVE Record

CVE-2021-35590: Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General).

Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General). Supported versions that are affected are 7.4.33 and prior, 7.5.23 and prior, 7.6.19 and prior and 8.0.26 and prior. Difficult to exploit vulnerability allows high privileged attacker with access to the physical communication segment attached to the hardware where the MySQL Cluster executes to compromise MySQL Cluster. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of MySQL Cluster. CVSS 3.1 Base Score 6.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H).

MediumCVSS 6.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-35590 affects Oracle MySQL Cluster. A highly privileged attacker on the same physical communication segment could, with another user's interaction, take over the cluster. The exploitation requirements are restrictive, but the business impact is severe where MySQL Cluster supports critical services.

Executive priority

Prioritize remediation for production MySQL Cluster environments supporting sensitive or mission-critical workloads. The attack path is constrained, so this is not an emergency internet-wide issue, but successful compromise could mean full cluster takeover.

Technical view

Oracle describes this as a MySQL Cluster Cluster: General vulnerability affecting 7.4.33 and earlier, 7.5.23 and earlier, 7.6.19 and earlier, and 8.0.26 and earlier. CVSS 3.1 is 6.3, with adjacent-network access, high complexity, high privileges, required user interaction, and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most likely in organizations running affected MySQL Cluster versions on reachable or weakly segmented cluster communication networks. Internet-only exposure is not indicated by the supplied CVSS vector or description.

Exploitation context

The source bundle does not show CISA KEV listing or cited active exploitation. Exploitation is described as difficult and requires high privileges, access to the physical communication segment, and human interaction by someone else.

Researcher notes

The public description does not provide root-cause detail or safe detection indicators. Keep analysis centered on version exposure, network adjacency, privilege requirements, user-interaction dependency, and vendor advisory status. Do not infer exploit availability from the ZDI advisory alone.

Mitigation direction

  • Apply Oracle October 2021 CPU or later supported guidance for MySQL Cluster.
  • Upgrade affected MySQL Cluster versions beyond the listed vulnerable release thresholds.
  • Restrict access to the cluster physical communication segment to trusted administrative systems.
  • Review NetApp advisory if NetApp-managed environments may include affected components.

Validation and detection

  • Inventory MySQL Cluster deployments and record exact versions.
  • Flag versions 7.4.33, 7.5.23, 7.6.19, 8.0.26, and earlier.
  • Verify cluster communication networks are segmented from general user and server networks.
  • Confirm Oracle CPU or later vendor remediation is applied.
  • Check vulnerability scanner findings against actual MySQL Cluster version evidence.
Prepared
Confidence
medium
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

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CVE-2021-35590 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/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
6.3CVSS 3.1MediumCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H0.45.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.3Medium
CVSS 3.1 vector shape for CVE-2021-35590Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/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 Cluster7.4.33 and prior, 7.5.23 and prior, 7.6.19 and prior, 8.0.26 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.