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CVE Record

CVE-2021-2145: 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 6.1.20. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Oracle VM VirtualBox. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/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

CVE-2021-2145 is a high-severity Oracle VM VirtualBox Core vulnerability affecting versions prior to 6.1.20. It requires a highly privileged local attacker with logon access, but a successful attack can take over VirtualBox and affect confidentiality, integrity, and availability.

Executive priority

Treat as a high-priority maintenance and access-control issue, not an internet-scale emergency. Patch exposed VirtualBox estates promptly, especially where privileged users or shared systems increase insider or lateral-movement risk.

Technical view

The CVSS 3.1 score is 7.5 with local attack vector, high complexity, high privileges required, no user interaction, and changed scope. Oracle describes potential takeover of Oracle VM VirtualBox, with possible impact beyond the VirtualBox component.

Likely exposure

Exposure is limited to environments running Oracle VM VirtualBox before 6.1.20 where privileged users can log on to the host or infrastructure executing VirtualBox.

Exploitation context

The supplied sources do not state active exploitation, and the CVE is not marked KEV. Exploitation is described as difficult and requiring high privileges, reducing broad opportunistic risk but preserving serious insider or post-compromise risk.

Researcher notes

The available record names Oracle VM VirtualBox Core and affected versions prior to 6.1.20, but does not provide root-cause detail or CWE data. Avoid assuming exploitability beyond the stated local, high-privilege, high-complexity conditions.

Mitigation direction

  • Upgrade Oracle VM VirtualBox off versions prior to 6.1.20 following Oracle guidance.
  • Apply relevant operating system package advisories, including Gentoo guidance where applicable.
  • Restrict privileged logon access on systems running VirtualBox.
  • Prioritize hosts used for administration, development, or shared virtualization workloads.

Validation and detection

  • Inventory VirtualBox installations and confirm installed versions.
  • Flag any VirtualBox version earlier than 6.1.20 as affected.
  • Review privileged local account access on affected systems.
  • Check vendor advisory status for platform-specific update instructions.
Prepared
Confidence
high
Sources
5

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-2021-2145 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
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:H/PR:H/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
4Source 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:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H0.86Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2021-2145Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:H/PR:H/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 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.