LiveActive security incident?Get immediate response
CVE Record

CVE-2021-2310: 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
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-2310 is a high-severity Oracle VM VirtualBox Core vulnerability affecting supported versions before 6.1.20. An already high-privileged local attacker could compromise VirtualBox and potentially affect additional products.

Executive priority

Prioritize remediation on systems where VirtualBox runs sensitive workloads or is accessible to multiple administrators. The vulnerability is not described as remotely exploitable, but compromise could fully affect VirtualBox and potentially connected products.

Technical view

The CVSS 3.1 vector is AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H, score 7.5. Exploitation requires local access, high privileges, and high attack complexity, but successful exploitation can take over Oracle VM VirtualBox with confidentiality, integrity, and availability impact.

Likely exposure

Exposure is likely limited to systems running Oracle VM VirtualBox before 6.1.20 where high-privileged users can log on. Risk is higher on shared administrator workstations, lab hosts, build machines, and virtualization hosts used for sensitive workloads.

Exploitation context

The provided sources do not indicate known active exploitation, and CISA KEV status is false. Oracle describes exploitation as difficult and requiring a high-privileged attacker with local logon to the infrastructure where VirtualBox executes.

Researcher notes

Public details in the provided bundle identify product, version boundary, CVSS vector, and impact, but not the root cause or exploit mechanics. Treat this as a local, high-privilege VirtualBox Core takeover issue and avoid assuming broader affected products without vendor confirmation.

Mitigation direction

  • Upgrade Oracle VM VirtualBox to 6.1.20 or later where applicable.
  • Apply Oracle April 2021 CPU guidance for affected deployments.
  • Check Gentoo GLSA-202208-36 if VirtualBox is installed through Gentoo packages.
  • Limit high-privileged local access to VirtualBox hosts.
  • Review vendor guidance if unsupported or custom-packaged VirtualBox is present.

Validation and detection

  • Inventory all hosts running Oracle VM VirtualBox.
  • Confirm installed VirtualBox versions are not prior to 6.1.20.
  • Identify users with high-privileged local logon access to those hosts.
  • Verify OS or distribution packages include the relevant security update.
  • Document exceptions where VirtualBox cannot be upgraded promptly.
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

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-2021-2310 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
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-2021-2310Attack 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.