CVE-2026-84165Network attack vectorHinoki check available

Cross-tenant command execution via missing VM authorization

Published Sep 1, 2026 · Updated Sep 1, 2026

Improper access control in OpenNebula before 7.4 allows remote authenticated users to execute commands on other users' virtual machines. The one.vm.exec function accepts a supplied virtual-machine identifier without verifying that the caller has access to that machine. A basic account needs only the identifier of another user's VM with qemu-agent enabled, after which arbitrary guest commands can read or alter data and interrupt services.

CVSS severity8.7
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper access control in OpenNebula before 7.4 allows remote authenticated users to execute commands on other users' virtual machines. The one.vm.exec function accepts a supplied virtual-machine identifier without verifying that the caller has access to that machine. A basic account needs only the identifier of another user's VM with qemu-agent enabled, after which arbitrary guest commands can read or alter data and interrupt services.

The record

CVE
CVE-2026-84165
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
OpenNebula Systems
Product
OpenNebula
Classifications
CWE-284, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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=0 <7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenNebula Systems · OpenNebulaversion=0 <7.4

Published CVSS scores

8.7INCIBECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

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

No observations available

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

Weakness, pattern, technique

CWE-284Improper Access Control
T1059Command and Scripting Interpreter

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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