NVD / CVE Program· CNA oracle

CVE-2026-21955: Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).

Noroxi assessment

Priority: Monitor (action score 32/100)

Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 0.30% (FIRST EPSS).
Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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. Easily exploitable 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 8.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).

HighCVSS 8.2 · v3.1—Proof of concept No fix recorded

BDU:2026-00844

Published: Jan 20, 2026
Updated: Jun 17, 2026
EPSS: 0.3% · 23th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 32 / 40 · 8.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · oracle: 8.2; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
oracle	vm virtualbox	cpe:2.3:a:oracle:vm_virtualbox

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

oracle vm virtualbox7.1.14
oracle vm virtualbox7.2.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (oracle). Independent of NVD's CPE analysis and usually ahead of it.

Oracle Corporation Oracle VM VirtualBox
- 7.1.14, 7.2.4affected

Same product

oracle: all records

Other highest-scoring records for the same primary product.

CVE-2014-2477Unspecified vulnerability in the Oracle VM VirtualBox component in Oracle Virtualization VirtualBox before 3.2.24, 4.0.26, 4.1.34, 4.2.26, a
40Plan
CVE-2014-0983Multiple array index errors in programs that are automatically generated by VBox/HostServices/SharedOpenGL/crserverlib/server_dispatch.py in
40Plan
CVE-2018-3294Vulnerability in the Oracle VM VirtualBox component of Oracle Virtualization (subcomponent: Core).
37Monitor

Published before and after this one in the same product

← EarlierCVE-2025-62592Oct 21, 2025 · Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
24Monitor
← EarlierCVE-2025-62641Oct 21, 2025 · Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
32Monitor
Later →CVE-2026-21956Jan 20, 2026 · Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:0	2026-07-16

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedJan 20, 2026
First PoCJul 16, 2026+176 d
TodayNov 3, 2026+287 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-219560 days apartVulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
32Monitor
CVE-2026-87277238 days apartVulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
30Monitor
CVE-2025-30725280 days apartVulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
26Monitor
CVE-2026-47041182 days apartVulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
24Monitor
CVE-2026-71128210 days apartVulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
24Monitor
CVE-2026-87282238 days apartVulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core).
24Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
Administrator privileges are required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Local
Attack complexity: Low
Privileges required: High
User interaction: None
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

www.oracle.com/security-alerts/cpujan2026.html

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records