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CVE Record

CVE-2026-21984: Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that are affected are 7.1.14 and 7.2.4. 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 (scope change). 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-2026-21984 is a high-severity Oracle VM VirtualBox Core vulnerability. An attacker already holding high privileges on the host infrastructure could compromise VirtualBox, potentially affecting confidentiality, integrity, and availability beyond the VirtualBox component due to scope change.

Executive priority

Prioritize remediation where VirtualBox runs on shared, sensitive, or administrator-accessible infrastructure. The attack requires high privileges, reducing likelihood, but successful compromise could fully take over VirtualBox and affect connected assets.

Technical view

Oracle reports affected supported versions are VirtualBox 7.1.14 and 7.2.4. CVSS 3.1 is 7.5: AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H. The issue is categorized as CWE-284 and can result in takeover of Oracle VM VirtualBox.

Likely exposure

Exposure is limited to environments running Oracle VM VirtualBox 7.1.14 or 7.2.4 where an attacker has high-privileged local/logon access to the infrastructure executing VirtualBox.

Exploitation context

Oracle describes exploitation as difficult and requiring high privileges with local access. The source bundle does not indicate CISA KEV listing or active exploitation in the wild.

Researcher notes

Key constraints are local attack vector, high attack complexity, high privileges required, no user interaction, and changed scope. Public sources provided do not include exploit details, proof of concept, or specific fixed version information.

Mitigation direction

  • Identify VirtualBox installations and versions across endpoints and servers.
  • Review Oracle's January 2026 Critical Patch Update guidance for this CVE.
  • Apply Oracle-provided updates or mitigations when confirmed by vendor guidance.
  • Restrict administrative access to systems running VirtualBox.
  • Monitor privileged account activity on VirtualBox host systems.

Validation and detection

  • Confirm whether VirtualBox 7.1.14 or 7.2.4 is installed.
  • Verify patch status against Oracle CPU January 2026 advisory.
  • Review host access controls for high-privilege users.
  • Check security monitoring for suspicious privileged activity on VirtualBox hosts.
Prepared
Confidence
medium
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-284: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-21984 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
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
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-2026-21984Attack 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 CorporationOracle VM VirtualBox7.1.14, 7.2.4Listed
Weakness

CWE details

CWE-284

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