CVE-2021-2306

Unauthorized data access by privileged users

Published Apr 22, 2021 · Updated Sep 26, 2024

Information disclosure in Oracle VM VirtualBox before 6.1.20 allows local high-privileged users to access critical data via the host. The affected locus is the VirtualBox Core component, but Oracle has not disclosed the operation on untrusted input that causes the unauthorized read. Exploitation requires logon with high privileges on the host where VirtualBox runs; reported impact is unauthorized access to critical or otherwise accessible VirtualBox data, without stated integrity or availability impact.

CVSS severity6.0
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Oracle VM VirtualBox before 6.1.20 allows local high-privileged users to access critical data via the host. The affected locus is the VirtualBox Core component, but Oracle has not disclosed the operation on untrusted input that causes the unauthorized read. Exploitation requires logon with high privileges on the host where VirtualBox runs; reported impact is unauthorized access to critical or otherwise accessible VirtualBox data, without stated integrity or availability impact.

The record

CVE
CVE-2021-2306
Published
Apr 22, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle VM VirtualBox
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <6.1.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle Corporation · Oracle VM VirtualBoxversion=unspecified <6.1.20

Published CVSS scores

6.0OracleCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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