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CVE Record

CVE-2021-35596: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Error Handling).

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

This MySQL Server flaw can let an already highly privileged network user crash or hang the database. It does not indicate data theft or modification, but it can disrupt applications that depend on affected MySQL versions.

Executive priority

Treat this as a reliability risk for business systems running older MySQL, not a confirmed breach indicator. Prioritize remediation where MySQL supports critical applications or is reachable by remote administrators.

Technical view

CVE-2021-35596 affects Oracle MySQL Server 8.0.26 and earlier in the Server: Error Handling component. The CVSS 3.1 score is 4.9, with network attack vector, low complexity, high privileges required, no user interaction, and high availability impact only.

Likely exposure

Exposure is most relevant where MySQL Server 8.0.26 or earlier is reachable over a network by highly privileged accounts. Internet exposure increases operational risk, but the source bundle does not say unauthenticated users can exploit it.

Exploitation context

The provided sources do not show active exploitation, and the CVE is not marked in KEV. The attacker must already hold high privileges and have network access via supported MySQL protocols.

Researcher notes

The source bundle provides CVSS, affected version scope, and availability-only impact, but no CWE, root-cause detail, proof of exploitation, or detailed fixed-version mapping. Avoid assuming broader MySQL forks or downstream products are affected without vendor confirmation.

Mitigation direction

  • Upgrade MySQL Server beyond 8.0.26 using Oracle's October 2021 CPU or trusted vendor packages.
  • For bundled or appliance software, follow NetApp and distribution advisories for applicable updates.
  • Limit network access to MySQL services to trusted administration paths and application hosts.
  • Review high-privilege MySQL accounts and remove unnecessary remote administrative access.

Validation and detection

  • Inventory MySQL Server instances and flag versions 8.0.26 or earlier.
  • Check package sources against Oracle, Fedora, NetApp, or platform vendor advisories.
  • Confirm MySQL administrative access is restricted to approved hosts and users.
  • Review database availability monitoring for unexplained hangs or repeat crashes.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2021-35596 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
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
4.9CVSS 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-2021-35596Attack 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.