CVE-2021-2131

Critical data modification by privileged local users

Published Jan 20, 2021 · Updated Sep 26, 2024

An unspecified Core flaw in Oracle VM VirtualBox before 6.1.18 allows local users with high privileges to modify critical accessible data. Oracle has not disclosed the flawed Core locus or the incorrect operation it performs on attacker-controlled input. Exploitation requires a high-privileged logon to the host, and resulting integrity changes can affect VirtualBox and additional products.

CVSS severity6.0
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An unspecified Core flaw in Oracle VM VirtualBox before 6.1.18 allows local users with high privileges to modify critical accessible data. Oracle has not disclosed the flawed Core locus or the incorrect operation it performs on attacker-controlled input. Exploitation requires a high-privileged logon to the host, and resulting integrity changes can affect VirtualBox and additional products.

The record

CVE
CVE-2021-2131
Published
Jan 20, 2021
Updated
Sep 26, 2024
Vendor
Oracle Corporation
Product
Oracle VM VirtualBox
Classifications
T1565
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 20, 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 <6.1.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle Corporation · Oracle VM VirtualBoxversion=unspecified <6.1.18

Published CVSS scores

6.0Oracle CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/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

T1565Data Manipulation

Public exploit references

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Technologies

Your stack

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Your stack

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