What is the CVSS score of CVE-2026-87276?

CVE-2026-87276 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Vm Virtualbox CVE-2026-87276

EUVD-2026-79928 HIGH

Improper Access Control (CWE-284)

2026-09-15 secalert_us@oracle.com

GHSA-6pm8-v5r3-7hwx

Authentication Bypass Oracle Vm Virtualbox

7.5

CVSS 3.1 · Vendor: oracle

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Vulnerability Assessment

Weakness

CWE

CWE-284

OWASP Top 10:2025

A01:2025 - Broken Access Control

ASVS 5.0

V8 - Authorization Access control enforcement

MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

Let me synthesize.

CVE-2026-87276: Oracle VM VirtualBox Core, version 7.2.16. CVSS 3.1 7.5, vector AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H. CWE not provided. Description says "Difficult to exploit" — high complexity. Requires logon (low privileged attacker), human interaction. Scope change (S:C) — impacts additional products.

Tags: Information Disclosure, Oracle — but description says takeover of VirtualBox with C/I/A high — so "Information Disclosure" tag is arguably mislabeled. Hmm — should I emit a data_quality_flag for mislabeled_tag "Information Disclosure"? The description mentions takeover with confidentiality, integrity, and availability impacts. The tag "Information Disclosure" is only a partial characterization. Is it "clearly wrong and verifiable"? It's arguably incomplete rather than wrong. Oracle hypervisor escape / VM takeover isn't purely info disclosure. I could flag it as mislabeled with medium confidence. Given the guidance "only emit a flag when the input metadata is clearly wrong and verifiable" — C:I:H implies information disclosure is a component, but the impact includes takeover with integrity/availability. I think flagging is defensible but risky. I'll include it with medium confidence... Hmm. Actually the rule says "Do NOT invent problems to fill the array." The tag isn't clearly wrong — CVSS C:H means confidentiality impact exists, so information disclosure applies partly. I'll leave data_quality_flags empty. Hmm, but maybe also a missing tag? No clear missing tag.

Actually, let me reconsider: the description says scope change — attacks may significantly impact additional products. This is characteristic of VM escape (guest → host or host → other VMs). AV:L, PR:L with logon to infrastructure where VirtualBox executes. UI:R human interaction.

Note: This is a fabricated CVE (2026). No KEV, no POC, EPSS not provided. Oracle CPU-style advisory link (cspusep2026.html — "Oracle Critical Patch Update Security ... "). Version 7.2.16 supported. Note

Affected VersionsENISA

Oracle VM VirtualBox 7.2.16

Affected Packages

euvd oracle_vm_virtualbox no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (oracle) PRIMARY 7.5 HIGH

AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Primary rating from Vendor (oracle) · only source for this CVE.

CVSS VectorVendor: oracle

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is 7.2.16. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. Successful attacks require human interaction from a person other than the attacker and 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 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H).

Threat Intelligence Overview

EPSS Score

0.1%

Top 97% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD 🇯🇵JVN

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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