CVE-2026-42833
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 control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code 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 confidenceCode injection vulnerability in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to inject and execute arbitrary code through improper control of code generation. This critical flaw stems from insufficient input validation or sanitization in Dynamics 365 components, enabling remote code execution over the network by authenticated users.
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>= 9.1, < 9.1.45.11CVSS 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
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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 deployment typeConfirm this is Microsoft Dynamics 365 on-premises (not Dynamics 365 Online/Cloud). This vulnerability affects only on-premises deployments.Affected if The deployment is Dynamics 365 on-premises; cloud/online deployments are not affected by this specific CVE.
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Check installed Dynamics 365 versionUse Dynamics 365 administrative tools or system information to determine the exact installed version number (for example, check the About page in Dynamics 365 or use PowerShell/Database queries to retrieve version information).Affected if The installed version falls within the range >= 9.1 and < 9.1.45.11.
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Confirm authenticated user accessVerify that user authentication is enabled and that users with valid credentials can access the Dynamics 365 environment.Affected if The environment allows authenticated user sessions, as this is an authenticated code injection vulnerability.
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Assess network exposureDetermine whether the Dynamics 365 web interface is accessible over the network (internal or external).Affected if The Dynamics 365 application is network-accessible, as the vulnerability enables remote code execution.
A user is affected if they run Microsoft Dynamics 365 on-premises with version 9.1 or higher but lower than 9.1.45.11, with network-accessible authenticated access.
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.
dbcve · scoped9.1.45.11
Apply Microsoft security patches for Dynamics 365 on-premises immediately. Review and harden code execution paths, implement proper input validation, and restrict permissions for authorized users to limit attack surface.
Microsoft Dynamics 365 (on-premises) version 9.1.45.11
- Identify current Microsoft Dynamics 365 (on-premises) version by checking the installed version in the Dynamics 365 Installation Manager or Power Platform Admin Center
- Schedule a maintenance window for the upgrade
- Back up all Dynamics 365 databases and configuration files
- Download Microsoft Dynamics 365 version 9.1.45.11 from the Microsoft Lifecycle Portal or Volume Licensing Service Center
- Apply the update using the Dynamics 365 Deployment Manager or the applicable update mechanism for your deployment type
- Verify the upgrade was successful by checking the version number post-installation
- Test critical business workflows to ensure functionality is intact
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $12,352.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-42833 — 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-2026-42833 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data