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CVE Record

CVE-2021-35537: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 8.0.25 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

This flaw can let a highly privileged network user crash or hang MySQL Server. It is not described as data theft or data alteration. Business impact is service availability: applications depending on affected MySQL instances could experience repeatable outages until patched or otherwise controlled.

Executive priority

Prioritize patching for production databases supporting critical applications, especially where privileged access is broadly distributed. The vulnerability is availability-focused and privilege-gated, so it is less urgent than unauthenticated remote code execution but still material for outage risk.

Technical view

CVE-2021-35537 affects Oracle MySQL Server 8.0.25 and prior in the Server DML component. The CVSS vector is network, low complexity, high privileges required, no user interaction, unchanged scope, and high availability impact only. Successful exploitation can cause a complete denial of service through hangs or repeated crashes.

Likely exposure

Exposure is limited to Oracle MySQL Server 8.0.25 and prior where high-privileged users can reach the server over supported network protocols. Internet exposure increases operational risk, but the sources do not state that unauthenticated or low-privileged attackers can exploit it.

Exploitation context

The CVE is not in CISA KEV, and the supplied sources do not report active exploitation. The attacker must already have high privileges and network access. No public exploit status is established by the provided bundle.

Researcher notes

The supplied record provides no CWE, root-cause detail, exploit procedure, or confirmed active exploitation. Analysis should stay focused on version exposure, privilege boundaries, network reachability, and vendor patch confirmation rather than exploit reproduction.

Mitigation direction

  • Apply Oracle's October 2021 Critical Patch Update guidance for MySQL Server.
  • Upgrade affected MySQL Server 8.0.25 and prior deployments to a vendor-supported fixed release.
  • Restrict network access to MySQL from only trusted application and administration paths.
  • Reduce and review high-privileged MySQL accounts with network access.
  • Check NetApp guidance if MySQL is embedded in NetApp-managed products.

Validation and detection

  • Inventory MySQL Server versions and flag 8.0.25 and prior.
  • Confirm Oracle CPU October 2021 or later vendor fixes are applied.
  • Review accounts with high MySQL privileges and network login capability.
  • Check monitoring history for unexplained MySQL hangs or repeated crashes.
  • Verify dependent vendor appliances against NetApp advisory applicability.
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-2021-35537 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-2021-35537Attack 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 Server8.0.25 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.