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CVE Record

CVE-2021-1994: Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Web Services).

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Web Services). Supported versions that are affected are 10.3.6.0.0 and 12.1.3.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2021-1994 is a critical Oracle WebLogic Server flaw that can let an unauthenticated attacker reach the server over HTTP and take it over. The business risk is high where affected WebLogic versions are exposed to internal or internet networks.

Executive priority

Treat this as an urgent remediation item for any exposed affected WebLogic server. The stated impact is complete server takeover without credentials, which can threaten hosted applications, data, and availability.

Technical view

The flaw affects Oracle WebLogic Server Web Services in versions 10.3.6.0.0 and 12.1.3.0.0. It is network exploitable over HTTP, requires no credentials or user interaction, and has full confidentiality, integrity, and availability impact. CVSS 3.1 score is 9.8.

Likely exposure

Exposure is limited by the provided sources to WebLogic Server 10.3.6.0.0 and 12.1.3.0.0 reachable over HTTP. The bundle does not identify affected CPEs, deployments, or downstream products.

Exploitation context

The sources describe easy unauthenticated network exploitation and possible WebLogic takeover. The bundle does not cite active exploitation, public exploit availability, or CISA KEV inclusion.

Researcher notes

The public bundle gives severity, affected versions, vector, and Oracle advisory reference, but not root cause details, proof-of-concept status, or specific compensating controls. Avoid expanding scope beyond the two listed versions without vendor confirmation.

Mitigation direction

  • Follow Oracle's January 2021 Critical Patch Update guidance for CVE-2021-1994.
  • Prioritize affected WebLogic servers reachable over HTTP from untrusted networks.
  • Restrict HTTP access to WebLogic management and application endpoints where business permits.
  • Retire or isolate unsupported affected WebLogic versions if updates are not immediately possible.

Validation and detection

  • Inventory WebLogic Server instances and record exact versions.
  • Confirm whether versions 10.3.6.0.0 or 12.1.3.0.0 are present.
  • Check whether affected servers accept HTTP connections from internal or internet networks.
  • Verify Oracle CPU guidance has been applied to affected systems.
  • Review logs for unusual unauthenticated HTTP activity against WebLogic endpoints.
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-2021-1994 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
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
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
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2021-1994Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 CorporationWebLogic Server10.3.6.0.0, 12.1.3.0.0Listed
Weakness

CWE details

No CWE listed

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