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CVE Record

CVE-2021-2372: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 5.7.34 and prior and 8.0.25 and prior. Difficult to exploit 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 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/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-2021-2372 is a MySQL Server InnoDB flaw that can let a highly privileged network attacker crash or hang MySQL. The cited record does not indicate data theft or tampering. Business impact is service downtime for databases still running affected 5.7 or 8.0 releases.

Executive priority

Treat as a scheduled remediation item unless the database is business-critical, internet-exposed, or broadly accessible to privileged users. Prioritize systems where downtime would disrupt customer-facing or revenue operations.

Technical view

Oracle lists affected MySQL Server versions as 5.7.34 and prior, and 8.0.25 and prior. The CVSS vector is AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H, meaning network reachable, difficult to exploit, requires high privileges, and impacts availability only.

Likely exposure

Exposure is most likely where MySQL Server 5.7.34 or earlier, or 8.0.25 or earlier, remains reachable by highly privileged users over network protocols.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation. Exploitation is described as difficult and requiring high privileges, but successful attacks can cause a complete denial of service.

Researcher notes

The public record gives component, affected versions, CVSS, and impact, but not root-cause detail or proof-of-concept evidence. Avoid assuming confidentiality or integrity impact; the cited impact is availability-only denial of service.

Mitigation direction

  • Apply Oracle July 2021 CPU guidance for affected MySQL Server deployments.
  • Upgrade beyond MySQL 5.7.34 and 8.0.25 using vendor-supported packages.
  • Review Fedora package advisories if using Fedora-provided MySQL/MariaDB-related packages.
  • Check NetApp guidance for products that may bundle or depend on MySQL.
  • Limit network access and high-privilege database accounts to trusted administrators.

Validation and detection

  • Inventory MySQL Server versions and identify 5.7.34-or-earlier and 8.0.25-or-earlier systems.
  • Confirm whether exposed services allow network access to privileged database users.
  • Verify vendor package update status against Oracle, Fedora, or appliance advisories.
  • Check operational monitoring for unexplained MySQL hangs or repeatable crashes.
  • Document any compensating access controls if patching is delayed.
Prepared
Confidence
high
Sources
8

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-2021-2372 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:N/AC:H/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
7Source 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:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H0.73.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.4Medium
CVSS 3.1 vector shape for CVE-2021-2372Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/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 Server5.7.34 and prior, 8.0.25 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.