{
"document": {
"acknowledgments": [
{
"names": [
"nxhoang99 and hoangha with VCSLab of Viettel Cyber Security"
]
},
{
"names": [
"TALHA GÜNAY"
]
},
{
"names": [
"f7d8c52bec79e42795cf15888b85cbad"
]
},
{
"names": [
"nxhoang99 and hoangha with VCSLab of Viettel Cyber Security"
]
},
{
"names": [
"Kentaro Kawane with GMO Cybersecurity by Ierae, Inc."
]
}
],
"aggregate_severity": {
"namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Public",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en-US",
"notes": [
{
"category": "general",
"text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
},
{
"category": "general",
"text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
"title": "Customer Action"
}
],
"publisher": {
"category": "vendor",
"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
"namespace": "https://msrc.microsoft.com"
},
"references": [
{
"category": "self",
"summary": "CVE-2026-42833 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42833"
},
{
"category": "self",
"summary": "CVE-2026-42833 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42833.json"
},
{
"category": "external",
"summary": "Microsoft Exploitability Index",
"url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
},
{
"category": "external",
"summary": "Microsoft Support Lifecycle",
"url": "https://support.microsoft.com/lifecycle"
},
{
"category": "external",
"summary": "Common Vulnerability Scoring System",
"url": "https://www.first.org/cvss"
}
],
"title": "Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability",
"tracking": {
"current_release_date": "2026-05-13T07:00:00.000Z",
"generator": {
"date": "2026-06-09T19:32:20.186Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2026-42833",
"initial_release_date": "2026-05-12T07:00:00.000Z",
"revision_history": [
{
"date": "2026-05-12T07:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2026-05-13T07:00:00.000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Updated the fixed version number. This is an informational change only."
}
],
"status": "final",
"version": "2"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "<9.1.45.11",
"product": {
"name": "Microsoft Dynamics 365 (on-premises) version 9.1 <9.1.45.11",
"product_id": "1"
}
},
{
"category": "product_version",
"name": "9.1.45.11",
"product": {
"name": "Microsoft Dynamics 365 (on-premises) version 9.1 9.1.45.11",
"product_id": "11921"
}
}
],
"category": "product_name",
"name": "Microsoft Dynamics 365 (on-premises) version 9.1"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-42833",
"cwe": {
"id": "CWE-250",
"name": "Execution with Unnecessary Privileges"
},
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "Successful exploitation of this vulnerability requires an attacker to already have a high level of access, specifically a System Administrator role in Microsoft Dynamics 365 CRM. As a result, this issue cannot be exploited by an unauthenticated or low-privilege user and would only be relevant to users who already have elevated permissions.",
"title": "According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability?"
},
{
"category": "faq",
"text": "An attacker with System Administrator privileges could modify specific data associated with background operations through the CRM web interface. When the system later processes this data, it may be deserialized without proper validation, allowing the attacker to trigger unauthorized commands on the CRM server.",
"title": "How could an attacker exploit this vulnerability?"
},
{
"category": "faq",
"text": "This vulnerability could lead to the attacker gaining the ability to interact with other tenant’s applications and content.",
"title": "According to the CVSS metric, successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?"
}
],
"product_status": {
"fixed": [
"11921"
],
"known_affected": [
"1"
]
},
"references": [
{
"category": "self",
"summary": "CVE-2026-42833 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42833"
},
{
"category": "self",
"summary": "CVE-2026-42833 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-42833.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-12T07:00:00.000Z",
"details": "9.1.45.11:Security Update:https://support.microsoft.com/help/5078943",
"product_ids": [
"1"
],
"url": "https://support.microsoft.com/help/5078943"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "CHANGED",
"temporalScore": 7.9,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1"
]
}
],
"threats": [
{
"category": "impact",
"details": "Remote Code Execution"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
}
],
"title": "Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability"
}
]
}