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CVE Record

CVE-2021-2371: Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core).

Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 3.7.1.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle Coherence. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Coherence. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This is a denial-of-service flaw in Oracle Coherence. An unauthenticated attacker with network access over T3 or IIOP could make affected Coherence instances hang or crash repeatedly. The business impact is service disruption, not documented data theft or tampering in the provided sources.

Executive priority

Treat as high priority where Oracle Coherence supports critical applications or exposes T3/IIOP beyond trusted networks. The main risk is outage and operational disruption, not confidentiality loss based on provided evidence.

Technical view

CVE-2021-2371 affects Oracle Coherence Core versions 3.7.1.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0. It is network exploitable, low complexity, requires no privileges or user interaction, and has high availability impact only.

Likely exposure

Organizations running affected Oracle Coherence versions are exposed if T3 or IIOP network access is reachable by untrusted users or networks. Internet or partner-facing middleware paths raise urgency.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector indicates unauthenticated, low-complexity network exploitation, so exposure should be treated seriously even without confirmed exploitation evidence.

Researcher notes

No CWE is provided in the source bundle. Analysis should focus on affected version confirmation, protocol reachability, availability impact, and Oracle CPU remediation status. Avoid assuming exploit availability or root cause details beyond Oracle's description.

Mitigation direction

  • Review Oracle July 2021 Critical Patch Update guidance for CVE-2021-2371.
  • Upgrade or patch affected Oracle Coherence versions per Oracle support guidance.
  • Restrict T3 and IIOP access to trusted networks only.
  • Prioritize systems supporting customer-facing or business-critical services.
  • Monitor affected services for hangs, repeated crashes, and availability degradation.

Validation and detection

  • Inventory Oracle Coherence deployments and record exact versions.
  • Identify whether T3 or IIOP is enabled and network-reachable.
  • Compare installed patch levels with Oracle July 2021 CPU guidance.
  • Check logs and monitoring for repeated Coherence crashes or hangs.
  • Confirm compensating network restrictions are enforced around affected services.
Prepared
Confidence
high
Sources
3

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-2021-2371 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
2Source 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
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2021-2371Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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 CorporationCoherence3.7.1.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.