CVE-2026-42822
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges over a network.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAzure Local Disconnected Operations contains an improper authentication vulnerability that allows an unauthenticated remote attacker to bypass authentication mechanisms and elevate privileges to administrative levels. The flaw exists in the authentication logic for Azure Arc-enabled local infrastructure when operating in disconnected mode, enabling network-based privilege escalation without requiring valid credentials.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2604.2.25645all versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Azure Local deploymentReview your Azure subscription and on-premises infrastructure to determine if Microsoft Azure Local (formerly Azure Stack HCI) is deployed in your environment. Check the Azure portal under 'Azure Arc' resources for Azure Local cluster registrations.Affected if Azure Local is present in the environment
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Check Azure Local versionRun 'Get-AzureStackHCI' PowerShell command or check cluster properties in the Azure portal to obtain the installed version. Compare against 2604.2.25645.Affected if Installed version is less than 2604.2.25645
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Verify disconnected operations mode statusCheck Azure Arc configuration for Azure Local clusters using 'Get-AzStackHCIArcIntegration' or review cluster settings in the Azure portal to determine if disconnected operations mode is enabled.Affected if Disconnected operations mode is enabled on the Azure Local cluster
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Audit Azure Resource Manager exposureReview Azure Resource Manager endpoints and network configurations accessible from the Azure Local environment. Check for unauthenticated API endpoints or misconfigured authentication settings.Affected if Azure Resource Manager is accessible from the Azure Local environment without proper authentication controls
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Review administrative accounts and privilege changesExamine Azure Local and Azure Arc audit logs for any unexpected administrative account creation, role assignments, or privilege escalation events. Check logs for authentication attempts from unexpected sources.Affected if Unexpected administrative accounts or privilege escalation events are found in audit logs
The environment is affected if Azure Local version is below 2604.2.25645 with disconnected operations mode enabled, or if Azure Resource Manager is exposed without proper authentication controls.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data2604.2.25645
Apply Microsoft security patches for Azure Local as they become available. Ensure network segmentation is in place and review Azure Arc authentication configurations for disconnected operations environments.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-42822 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-42822 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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