Security readout for executives and security teams
Plain-English summary
CVE-2021-35594 affects Oracle MySQL Cluster and could allow takeover of the cluster if several restrictive conditions are met. The attacker needs high privileges, access to the physical communication segment where the cluster runs, and successful exploitation requires another person’s interaction. Business impact is serious, but practical exposure appears limited.
Executive priority
Treat as a scheduled but meaningful remediation item. Prioritize faster where MySQL Cluster supports critical services, stores sensitive data, or has weak network segmentation. The likely exploitation path is constrained, but successful compromise could affect confidentiality, integrity, and availability of the cluster.
Technical view
Oracle describes this as a MySQL Cluster vulnerability in the Cluster: General component 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 attack vector, high complexity, high privileges, user interaction, and high CIA impact.
Likely exposure
Exposure is most likely in organizations running affected MySQL Cluster versions, especially where cluster communication networks are reachable by privileged administrators or adjacent infrastructure operators. Standalone MySQL Server deployments are not identified in the provided sources as affected.
Exploitation context
The bundle does not show KEV listing or cited active exploitation. Exploitation is described as difficult and dependent on high privilege, adjacent physical communication segment access, and human interaction. Public technical detail is limited in the provided sources.
Researcher notes
The provided sources identify affected versions, CVSS vector, required privileges, interaction, and takeover impact, but do not include root cause details, CWE mapping, proof of exploitation, or fixed version numbers. Avoid assuming affected products beyond Oracle MySQL Cluster and vendor-confirmed downstream advisories.
Mitigation direction
- Inventory MySQL Cluster deployments and record exact versions.
- Review Oracle October 2021 CPU guidance for corrected MySQL Cluster releases.
- Upgrade affected MySQL Cluster versions according to vendor guidance.
- Restrict access to cluster communication segments to required trusted systems.
- Check NetApp guidance if MySQL Cluster is used with NetApp products.
Validation and detection
- Confirm whether any MySQL Cluster version is 7.4.33, 7.5.23, 7.6.19, 8.0.26, or earlier.
- Verify cluster communication networks are segmented from general administrative networks.
- Review privileged account access to MySQL Cluster hosts and management paths.
- Confirm vendor advisory status for Oracle and any dependent platform vendors.
- Document whether compensating network controls exist before upgrade completion.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-35594 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H0.45.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-1227/CVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211022-0003/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.