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CVE Record

CVE-2022-21556: 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 8.0.28 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 creation, deletion or modification access to critical data or all MySQL Server accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H).

MediumCVSS 6.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This MySQL Server flaw can let a highly privileged network attacker alter critical database data or crash the server. It is not a low-skill internet drive-by issue because high privileges are required, but exposed or poorly governed administrative access raises business risk.

Executive priority

Treat this as a prioritized database maintenance item, not a declared emergency. Patch affected MySQL systems promptly, with higher urgency for internet-reachable, partner-reachable, or broadly accessible administrative database environments.

Technical view

CVE-2022-21556 affects Oracle MySQL Server 8.0.28 and prior in the Server: Optimizer component. The CVSS 3.1 score is 6.5 with network access, low complexity, high privileges required, no user interaction, and high integrity and availability impact.

Likely exposure

Organizations running MySQL Server 8.0.28 or earlier are potentially exposed, especially where privileged database access is reachable over network protocols. The provided sources do not identify additional affected versions beyond Oracle MySQL Server.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires a high privileged attacker with network access, so insider misuse, compromised admin credentials, or overexposed database management paths are the main concern.

Researcher notes

The vulnerability is integrity and availability focused, with no confidentiality impact in the CVSS vector. The bundle names Server: Optimizer but provides no root-cause detail, proof of concept, exploit telemetry, or exact fixed build number.

Mitigation direction

  • Review Oracle July 2022 CPU guidance for the MySQL Server fix.
  • Upgrade affected MySQL Server deployments to a vendor-supported fixed release.
  • Restrict network access to MySQL administrative interfaces and trusted hosts.
  • Audit and reduce high-privilege database accounts where possible.
  • Check NetApp guidance if MySQL is embedded in supported NetApp products.

Validation and detection

  • Inventory MySQL Server versions and identify 8.0.28 or earlier instances.
  • Confirm whether Oracle July 2022 CPU or later fixes are applied.
  • Review network paths that allow privileged access to MySQL Server.
  • Audit privileged account use for unusual data changes or repeated crashes.
  • Check vendor advisories for appliance or bundled MySQL exposure.
Prepared
Confidence
medium
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-2022-21556 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
6.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/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
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H1.25.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2022-21556Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/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 Server8.0.28 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.