CVE-2026-21987

Host-side takeover by high-privilege local users

Published Jan 20, 2026 · Updated Jan 20, 2026

Unspecified Core flaw in Oracle VM VirtualBox 7.1.14 and 7.2.4 allows local users with high privileges to take over VirtualBox. Oracle has not published the vulnerable function, input, or incorrect operation within the Core component. Exploitation requires high-privilege logon to the host infrastructure, and successful attacks can cross a security boundary and significantly affect additional products.

CVSS severity8.2
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unspecified Core flaw in Oracle VM VirtualBox 7.1.14 and 7.2.4 allows local users with high privileges to take over VirtualBox. Oracle has not published the vulnerable function, input, or incorrect operation within the Core component. Exploitation requires high-privilege logon to the host infrastructure, and successful attacks can cross a security boundary and significantly affect additional products.

The record

CVE
CVE-2026-21987
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Oracle
Product
Oracle VM VirtualBox
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 2026Record 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=7.1.14
  2. Affected versionversion=7.2.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle · Oracle VM VirtualBoxversion=7.1.14; version=7.2.4

Published CVSS scores

8.2OracleCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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