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CVE Record

CVE-2021-2441: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). 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

CVE-2021-2441 is a MySQL Server denial-of-service issue in the optimizer component. A highly privileged attacker with network access could make the database hang or crash repeatedly. The business impact is service availability, not confirmed data theft or data modification.

Executive priority

Treat this as a moderate availability risk. Prioritize internet-facing, business-critical, or shared MySQL systems first, especially where privileged credentials are broadly used or operational downtime would affect customers.

Technical view

Oracle describes affected MySQL Server versions as 8.0.25 and prior. The CVSS vector is AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H, meaning remote network access is possible, but exploitation requires high privileges and affects availability only.

Likely exposure

Exposure is most relevant where MySQL Server 8.0.25 or earlier remains deployed and reachable over network protocols by highly privileged database users or applications using privileged accounts.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation evidence. The vulnerability is described as easily exploitable after high privileges are obtained, with the main outcome being repeated crash or hang of MySQL Server.

Researcher notes

No CWE is provided in the source bundle. Analysis should stay focused on Oracle MySQL Server optimizer behavior, supported affected versions, and denial-of-service impact. Do not assume confidentiality or integrity impact beyond the stated CVSS vector.

Mitigation direction

  • Upgrade affected MySQL Server deployments according to Oracle July 2021 CPU guidance.
  • Restrict MySQL network access to trusted hosts and required application paths.
  • Reduce use of highly privileged MySQL accounts by applications and operators.
  • Review NetApp advisory guidance if NetApp-managed products are in scope.
  • Increase monitoring for MySQL crashes, hangs, and unexplained restarts.

Validation and detection

  • Inventory MySQL Server versions and flag 8.0.25 or earlier.
  • Confirm whether affected instances are reachable over network protocols.
  • Review privileged database accounts and application connection privileges.
  • Check patch records against Oracle July 2021 CPU guidance.
  • Examine database logs for repeated crashes, hangs, or restart loops.
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-2021-2441 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-2021-2441Attack 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.