LiveActive security incident?Get immediate response
CVE Record

CVE-2021-2134: Vulnerability in the Enterprise Manager for Fusion Middleware product of Oracle Enterprise Manager (compone...

Vulnerability in the Enterprise Manager for Fusion Middleware product of Oracle Enterprise Manager (component: FMW Control Plugin). The supported version that is affected is 12.2.1.4. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Enterprise Manager for Fusion Middleware. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Enterprise Manager for Fusion Middleware. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 6.5Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This flaw can let a low-privileged network user crash or hang Oracle Enterprise Manager for Fusion Middleware. The disclosed impact is denial of service, not data theft or tampering. Urgency depends on whether version 12.2.1.4 is deployed and reachable over HTTP.

Executive priority

Treat this as a moderate operational resilience issue. It does not indicate data compromise, but a crashable management console can disrupt administration and response workflows. Prioritize remediation where Enterprise Manager is broadly reachable or business-critical.

Technical view

CVE-2021-2134 affects Oracle Enterprise Manager for Fusion Middleware 12.2.1.4, FMW Control Plugin. It is network exploitable over HTTP with low privileges, no user interaction, and low attack complexity. CVSS is 6.5, driven by high availability impact only.

Likely exposure

Exposure is limited to organizations running Oracle Enterprise Manager for Fusion Middleware 12.2.1.4 with the FMW Control Plugin accessible over HTTP to low-privileged users. Internet-facing or broadly reachable management interfaces would raise operational risk.

Exploitation context

The provided bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is described as easily exploitable, but the only stated consequence is a hang or repeatable crash causing complete denial of service.

Researcher notes

Source evidence is limited to the CVE record, CVE List data, and Oracle CPU reference. No CWE is provided. Do not expand affected products beyond Oracle Enterprise Manager for Fusion Middleware 12.2.1.4, FMW Control Plugin.

Mitigation direction

  • Review Oracle's April 2021 Critical Patch Update guidance for CVE-2021-2134.
  • Patch or update affected Oracle Enterprise Manager for Fusion Middleware 12.2.1.4 deployments per Oracle guidance.
  • Restrict HTTP access to Enterprise Manager administrative interfaces to trusted networks and users.
  • Reduce unnecessary low-privileged access to the FMW Control Plugin surface.
  • Monitor Enterprise Manager availability for repeated hangs or crashes.

Validation and detection

  • Inventory Oracle Enterprise Manager for Fusion Middleware instances and identify version 12.2.1.4.
  • Confirm whether the FMW Control Plugin is present and reachable over HTTP.
  • Check patch status against Oracle's April 2021 Critical Patch Update.
  • Review access controls for low-privileged users reaching Enterprise Manager over the network.
  • Examine operational logs for repeated crashes, hangs, or availability alerts.
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

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

cve · low confidence lookup

CVE-2021-2134 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/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
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2021-2134Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/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 CorporationEnterprise Manager for Fusion Middleware12.2.1.4Listed
Weakness

CWE details

No CWE listed

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