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CVE Record

CVE-2021-35648: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: FTS).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: FTS). Supported versions that are affected are 8.0.26 and prior. Easily exploitable 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 4.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-35648 can let a highly privileged, network-connected attacker crash or hang MySQL Server. The business impact is service availability, not data theft or tampering, based on the provided CVSS vector. It affects supported MySQL Server versions 8.0.26 and prior.

Executive priority

Treat as a moderate availability risk. Prioritize remediation for production systems where MySQL downtime affects revenue, operations, or customer-facing services, especially where privileged access is broadly distributed.

Technical view

Oracle describes this as an easily exploitable MySQL Server vulnerability in the Server: FTS component. Attack prerequisites are network access over multiple protocols and high privileges. Successful exploitation can cause a hang or frequently repeatable complete denial of service. CVSS 3.1 score is 4.9 with availability impact only.

Likely exposure

Exposure is most likely where MySQL Server 8.0.26 or earlier is still deployed and reachable by users or services holding high database privileges. Internet exposure is not required, but network access to MySQL matters.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The flaw is described as easy to exploit, but only by a high-privileged attacker with network access.

Researcher notes

The available evidence identifies product, version range, component, prerequisites, and impact, but does not provide root cause, patch version, exploit details, or observed exploitation. Avoid assuming unauthenticated or data-impacting behavior.

Mitigation direction

  • Review Oracle's October 2021 CPU guidance for the supported MySQL update path.
  • Apply vendor-provided MySQL Server security updates where applicable.
  • Restrict MySQL network access to trusted hosts and applications.
  • Minimize high-privileged database accounts and service credentials.
  • Review NetApp advisory applicability if MySQL is supplied through NetApp environments.

Validation and detection

  • Inventory MySQL Server deployments and record exact versions.
  • Flag supported MySQL Server versions 8.0.26 and prior for review.
  • Confirm whether MySQL network access is limited to trusted sources.
  • Audit which accounts and services hold high MySQL privileges.
  • Check monitoring history for unexplained MySQL hangs or repeatable crashes.
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-2021-35648 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
4.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/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
4.9CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H1.23.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.9Medium
CVSS 3.1 vector shape for CVE-2021-35648Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/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.