Security readout for executives and security teams
Plain-English summary
Oracle VM VirtualBox versions before 6.1.20 contain a high-severity core integrity flaw. An attacker who can log on to the infrastructure where VirtualBox runs could tamper with critical VirtualBox-accessible data. This is a local access issue, but compromise may affect additional products using that VirtualBox environment.
Executive priority
Prioritize patching on shared or sensitive hosts. This is not described as remotely exploitable from the internet, but it can allow data tampering where an attacker already has infrastructure logon access, which matters in labs, CI, desktop virtualization, and multi-user environments.
Technical view
CVE-2021-2281 affects Oracle VM VirtualBox Core before 6.1.20. CVSS 3.1 is 7.1 with AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N. The source bundle describes low-complexity local attack conditions with no privileges or user interaction required, producing high integrity impact and changed scope, without confidentiality or availability impact stated.
Likely exposure
Exposure is most likely on workstations, build hosts, labs, or servers running Oracle VM VirtualBox earlier than 6.1.20. The attacker needs logon access to the infrastructure where VirtualBox executes, so prioritize shared systems and environments where untrusted users can access the host.
Exploitation context
The bundle does not cite CISA KEV listing or public active exploitation. Treat this as a meaningful integrity risk because the CVSS vector indicates easy local exploitation and possible impact beyond VirtualBox, but do not assume internet-scale exploitation from the provided evidence.
Researcher notes
No CWE is provided in the bundle. Oracle identifies the affected component as Core and the supported affected version range as prior to 6.1.20. Research should focus on confirming version exposure, host logon pathways, VirtualBox-accessible data, and downstream products affected by changed-scope integrity impact.
Mitigation direction
- Upgrade Oracle VM VirtualBox to 6.1.20 or later per Oracle guidance.
- Apply relevant OS or distribution security updates, including Gentoo guidance where applicable.
- Restrict logon access to hosts running VirtualBox until patched.
- Review systems where VirtualBox can access sensitive or critical data.
- Check Oracle’s advisory for any product-specific prerequisites or follow-up guidance.
Validation and detection
- Inventory VirtualBox installations and record installed versions.
- Confirm no production or shared host runs VirtualBox before 6.1.20.
- Verify package manager or vendor update history for remediation evidence.
- Review host access controls for users able to log on locally.
- Document any dependent products or workflows using affected VirtualBox hosts.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-2021-2281 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N2.54Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuapr2021.htmlCVE reference · x_refsource_MISC
- GLSA-202208-36CVE reference · vendor-advisory, x_refsource_GENTOO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.