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CVE Record

CVE-2021-2475: Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox. CVSS 3.1 Base Score 4.4 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

MediumCVSS 4.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2475 is a denial-of-service vulnerability in Oracle VM VirtualBox Core. An attacker who already has high privileges on the system where VirtualBox runs could cause VirtualBox to hang or crash repeatedly. The main business impact is disruption to virtualized workloads, not data theft or privilege escalation based on the provided sources.

Executive priority

Treat this as a moderate operational resilience issue. It is unlikely to be a remote breach path from the supplied evidence, but vulnerable VirtualBox hosts supporting business workflows should be patched on a normal security maintenance timeline.

Technical view

Oracle describes this as an easily exploitable local vulnerability in VM VirtualBox before 6.1.28. CVSS 3.1 is 4.4 with AV:L, PR:H, UI:N, and availability impact only. No CWE or root-cause detail is provided in the source bundle.

Likely exposure

Exposure is limited to environments running Oracle VM VirtualBox versions prior to 6.1.28, especially developer workstations, labs, CI systems, or operational hosts where users hold high local privileges.

Exploitation context

The CVE is not listed as KEV in the supplied data, and no cited source states active exploitation. Exploitation requires local access and high privileges, reducing broad internet risk while preserving operational disruption risk.

Researcher notes

Sources identify the affected component as VirtualBox Core and impact as complete denial of service. No CWE, exploit details, or deeper root cause are provided. Avoid assuming confidentiality, integrity, or privilege-escalation impact beyond the CVSS vector.

Mitigation direction

  • Upgrade Oracle VM VirtualBox to 6.1.28 or later per vendor guidance.
  • Apply Oracle Critical Patch Update and relevant distribution security updates.
  • Restrict high-privilege access on systems running VirtualBox.
  • Prioritize hosts running important or shared virtualized workloads.

Validation and detection

  • Inventory systems with Oracle VM VirtualBox installed.
  • Confirm installed VirtualBox versions are not prior to 6.1.28.
  • Review privileged user access on VirtualBox hosts.
  • Check for recurring VirtualBox hangs or crashes in operational logs.
Prepared
Confidence
high
Sources
4

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-2021-2475 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
4.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/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
3Source 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
4.4CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H0.83.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.4Medium
CVSS 3.1 vector shape for CVE-2021-2475Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/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 CorporationVM VirtualBoxunspecifiedListed
Weakness

CWE details

No CWE listed

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