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CVE Record

CVE-2021-2010: Vulnerability in the MySQL Client product of Oracle MySQL (component: C API).

Vulnerability in the MySQL Client product of Oracle MySQL (component: C API). Supported versions that are affected are 5.6.50 and prior, 5.7.32 and prior and 8.0.22 and prior. Difficult to exploit vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Client. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of MySQL Client accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of MySQL Client. CVSS 3.1 Base Score 4.2 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L).

MediumCVSS 4.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2010 affects Oracle MySQL Client C API versions up to 5.6.50, 5.7.32, and 8.0.22. A successful attack could let a low-privileged network attacker alter some data accessible through the client and cause partial service disruption. The published score is medium, and exploitation is described as difficult.

Executive priority

Treat this as a routine but necessary patching item, not an emergency based on supplied evidence. Prioritize internet-adjacent, shared, or business-critical systems that use affected MySQL client components, then close remaining exposure through normal vulnerability management.

Technical view

The issue is in Oracle MySQL Client, component C API. Oracle rates it CVSS 3.1 4.2 with AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L. Impact is limited to integrity and availability, with no confidentiality impact stated. The supplied sources do not provide CWE details or technical root cause.

Likely exposure

Organizations may be exposed where affected MySQL client libraries or packages remain in applications, servers, developer workstations, containers, Linux distributions, or vendor appliances. Exposure depends on use of affected client versions and whether low-privileged network access is possible.

Exploitation context

The CVE is not listed as KEV in the supplied bundle, and no cited source states active exploitation. Oracle describes exploitation as difficult and requiring low privilege plus network access over multiple protocols. Public exploit maturity is not established by the provided sources.

Researcher notes

The public bundle identifies affected versions and impact but not root cause, CWE, exploit technique, or fixed version mapping. Validation should focus on version and package advisory correlation. Do not assume server-side exploitability beyond the stated MySQL Client C API scope.

Mitigation direction

  • Apply Oracle January 2021 CPU guidance for affected MySQL client versions.
  • Update MySQL client packages through relevant OS vendor advisories, including Fedora or Gentoo where applicable.
  • Check appliance and third-party vendor advisories for bundled MySQL client components.
  • Reduce unnecessary low-privileged network access to MySQL-related services and client workflows.
  • Plan replacement for unsupported MySQL branches where vendor fixes are unavailable.

Validation and detection

  • Inventory MySQL client and C API library versions across hosts, containers, and build images.
  • Confirm no 5.6.50, 5.7.32, 8.0.22, or earlier affected versions remain.
  • Review OS package advisory status for Fedora, Gentoo, and other deployed distributions.
  • Check vendor appliances and managed products against their published advisories.
  • Document exceptions where upgrade status cannot be verified.
Prepared
Confidence
high
Sources
7

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-2021-2010 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
4.2 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

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
6Source 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
4.2CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L1.62.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.2Medium
CVSS 3.1 vector shape for CVE-2021-2010Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

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 Server5.6.50 and prior, 5.7.32 and prior, 8.0.22 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.