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CVE Record

CVE-2021-35632: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Data Dictionary).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Data Dictionary). Supported versions that are affected are 8.0.26 and prior. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where MySQL Server executes 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 4.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-35632 is a MySQL Server availability flaw. An attacker who already has high privileges and local logon access to the infrastructure running MySQL could make the database hang or repeatedly crash. The source bundle does not indicate data theft, data modification, remote exploitation, or confirmed active exploitation.

Executive priority

Treat this as a targeted availability risk, not an emergency remote-compromise issue. Prioritize remediation for business-critical databases, shared platforms, and systems where privileged access is broadly delegated or weakly monitored.

Technical view

The affected component is MySQL Server Data Dictionary. Supported versions affected are MySQL Server 8.0.26 and prior. CVSS 3.1 is 4.4 with local attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high availability impact only.

Likely exposure

Exposure is most likely in environments still running Oracle MySQL Server 8.0.26 or earlier. Risk is constrained because exploitation requires a high-privileged attacker with local logon access to the MySQL Server infrastructure.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. The vulnerability is described as easily exploitable after high-privileged local access is obtained, making it more relevant for insider, post-compromise, or administrative-boundary scenarios than internet-facing attacks.

Researcher notes

The source bundle identifies impact and prerequisites but does not include root cause details, exploit mechanics, proof-of-concept status, or a specific fixed version. Analysis should stay anchored to Oracle CPU and vendor advisories for remediation specifics.

Mitigation direction

  • Inventory MySQL Server versions and identify 8.0.26 or earlier deployments.
  • Apply Oracle October 2021 CPU guidance for MySQL Server.
  • Review NetApp advisory exposure if using NetApp products or managed integrations.
  • Restrict administrative and local logon access to MySQL infrastructure.
  • Monitor MySQL service stability until remediation is complete.

Validation and detection

  • Confirm installed MySQL Server versions across production and recovery environments.
  • Check whether any deployment remains on 8.0.26 or prior.
  • Verify Oracle CPU remediation guidance was applied successfully.
  • Review database logs for repeated crashes, hangs, or unexplained restarts.
  • Validate privileged access paths to MySQL hosts are limited and audited.
Prepared
Confidence
medium
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-2021-35632 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/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
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
4.4CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H0.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.4Medium
CVSS 3.1 vector shape for CVE-2021-35632Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/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 Server8.0.26 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.