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CVE Record

CVE-2021-2177: Vulnerability in the Oracle Secure Global Desktop product of Oracle Virtualization (component: Gateway).

Vulnerability in the Oracle Secure Global Desktop product of Oracle Virtualization (component: Gateway). The supported version that is affected is 5.6. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Secure Global Desktop. While the vulnerability is in Oracle Secure Global Desktop, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Oracle Secure Global Desktop.

CriticalCVSS 10Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2021-2177 is a critical flaw in Oracle Secure Global Desktop 5.6 Gateway. An unauthenticated network attacker could compromise the service and potentially take it over. Exposed instances should be treated as urgent until Oracle guidance is confirmed and applied.

Executive priority

Treat as emergency priority for any exposed Oracle Secure Global Desktop 5.6 environment. The potential outcome is service takeover without authentication, with complete business impact to confidentiality, integrity, and availability.

Technical view

Oracle rates this CVSS 10.0: AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. The affected component is Gateway in Oracle Secure Global Desktop 5.6. Successful exploitation can lead to full confidentiality, integrity, and availability impact and may significantly affect additional products, per the CVE description.

Likely exposure

Organizations are exposed if they run Oracle Secure Global Desktop 5.6, especially where the Gateway is reachable over networks. The source does not identify other affected versions.

Exploitation context

The provided sources describe easy unauthenticated network exploitation via multiple protocols, but do not cite public exploitation or CISA KEV listing. Active exploitation should not be assumed from this bundle.

Researcher notes

No CWE is listed in the bundle, and no exploit mechanics are provided. Analysis should stay focused on version exposure, Gateway reachability, Oracle CPU applicability, and evidence of remediation.

Mitigation direction

  • Identify any Oracle Secure Global Desktop 5.6 deployments and owners.
  • Review Oracle April 2021 Critical Patch Update guidance for this CVE.
  • Apply Oracle-provided fixes or mitigations where applicable.
  • Restrict network access to Gateway services until remediation is confirmed.
  • Prioritize internet-facing or partner-accessible deployments first.

Validation and detection

  • Inventory hosts running Oracle Secure Global Desktop and confirm version 5.6 presence.
  • Check whether Gateway services are network-reachable from untrusted networks.
  • Verify Oracle April 2021 CPU remediation status for each deployment.
  • Review logs for unusual access around Secure Global Desktop Gateway services.
  • Document compensating controls if patching cannot be immediate.
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-2021-2177 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
10 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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
10CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

10Critical
CVSS 3.1 vector shape for CVE-2021-2177Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 CorporationSecure Global Desktop5.6Listed
Weakness

CWE details

No CWE listed

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