CVE-2025-29826: Microsoft Dataverse Privilege Escalation

CVE-2025-29826 Overview

CVE-2025-29826 is a privilege escalation vulnerability in Microsoft Dataverse, the data platform underlying Microsoft Power Platform and Dynamics 365. The flaw stems from improper handling of insufficient permissions or privileges [CWE-280] combined with improper handling of exceptional conditions [CWE-755]. An authenticated attacker with low privileges can exploit the weakness over the network to elevate privileges within the Dataverse environment. Microsoft published the advisory on May 13, 2025.

Critical Impact
An authorized network attacker can elevate privileges in Microsoft Dataverse, gaining high-impact access to confidentiality, integrity, and availability of business data.

Affected Products

Microsoft Dataverse (cloud service)
Microsoft Power Platform environments backed by Dataverse
Dynamics 365 applications consuming Dataverse tables and APIs

Discovery Timeline

2025-05-13 - CVE-2025-29826 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-29826

Vulnerability Analysis

The vulnerability resides in how Microsoft Dataverse enforces permission checks when handling certain network-accessible operations. Dataverse maps users and security roles to row-level and column-level privileges across tables. The flaw allows an authenticated principal to perform actions that should require higher privileges than the principal holds. Exploitation occurs over the network with low attack complexity and no user interaction. A successful attack compromises confidentiality, integrity, and availability of the affected Dataverse environment.

Root Cause

The root cause is improper handling of insufficient permissions or privileges [CWE-280] in conjunction with improper handling of exceptional conditions [CWE-755]. Dataverse authorization logic fails to consistently enforce the expected privilege boundary when certain conditions or error states occur. As a result, a low-privileged attacker can reach code paths that grant access reserved for higher-privileged roles.

Attack Vector

The attacker must first authenticate to the target Dataverse tenant with a low-privileged account. From that authenticated context, the attacker sends crafted requests across the network to Dataverse Web API or related service endpoints. The requests trigger the flawed permission-handling logic and result in privilege elevation. No victim interaction is required. Microsoft has not released technical exploitation details, and no public proof-of-concept exists at this time. See the Microsoft Security Update CVE-2025-29826 advisory for vendor guidance.

Detection Methods for CVE-2025-29826

Indicators of Compromise

Unexpected security role assignments or RoleAssignmentChanged audit entries originating from low-privileged accounts.
API calls to privileged Dataverse Web API endpoints from user principals lacking the corresponding security role.
Bulk read or export operations against sensitive tables by accounts that historically did not access them.
Spikes in AuthorizationFailed followed by successful privileged operations from the same principal within a short window.

Detection Strategies

Enable Microsoft Purview audit logging for Dataverse and review Userprivilege and Roleprivilege events for anomalies.
Correlate Entra ID sign-in logs with Dataverse activity logs to identify privilege jumps tied to specific sessions.
Baseline normal API call patterns per security role and alert on deviations such as a user invoking WhoAmI followed by privileged metadata operations.

Monitoring Recommendations

Forward Dataverse and Power Platform audit logs to a centralized SIEM for retention beyond default windows.
Monitor changes to system administrator, system customizer, and environment maker roles in near real time.
Alert on creation of new application users, service principals, or impersonation grants within Dataverse environments.

How to Mitigate CVE-2025-29826

Immediate Actions Required

Confirm your Dataverse environments have received the Microsoft-managed service update referenced in the advisory.
Audit all Dataverse security roles and remove unnecessary privilege grants from low-trust accounts and service principals.
Rotate secrets and reassess access for any application users that exhibit suspicious API behavior.
Enforce conditional access and multifactor authentication for all identities that can authenticate to Power Platform.

Patch Information

Microsoft has remediated CVE-2025-29826 in the Dataverse cloud service. Because Dataverse is a Microsoft-hosted service, the fix is applied centrally and does not require customer-installed patches. Customers should validate that their environments are running on the updated service version and review the Microsoft Security Update CVE-2025-29826 advisory for any environment-specific guidance.

Workarounds

Apply least-privilege principles to Dataverse security roles, business units, and field-level security profiles.
Restrict network access to Dataverse environments using IP firewall rules and continuous access evaluation where supported.
Disable or scope down legacy authentication and unused application users until the environment is verified as updated.

bash

# Example: review Dataverse security role assignments via PowerShell
Install-Module -Name Microsoft.PowerApps.Administration.PowerShell -Scope CurrentUser
Add-PowerAppsAccount
Get-AdminPowerAppEnvironment | ForEach-Object {
    Get-AdminPowerAppEnvironmentRoleAssignment -EnvironmentName $_.EnvironmentName |
        Select-Object PrincipalDisplayName, RoleName, EnvironmentName
}