CVE-2025-29826
📋 TL;DR
CVE-2025-29826 is a privilege escalation vulnerability in Microsoft Dataverse where improper handling of insufficient permissions allows authenticated attackers to gain elevated privileges. This affects organizations using Microsoft Dataverse, particularly those with multi-user environments where different permission levels exist. Attackers must already have some level of authorized access to exploit this vulnerability.
💻 Affected Systems
- Microsoft Dataverse
📦 What is this software?
Dataverse by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker with basic user permissions could gain administrative privileges, potentially accessing sensitive data, modifying configurations, or compromising the entire Dataverse environment and connected systems.
Likely Case
Attackers with legitimate user accounts could elevate their privileges to access data or perform actions beyond their intended permissions, leading to data exposure or unauthorized modifications.
If Mitigated
With proper access controls, monitoring, and network segmentation, impact would be limited to isolated systems with minimal data exposure.
🎯 Exploit Status
Requires authenticated access. Exploitation likely involves manipulating permission checks or API calls.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific version
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29826
Restart Required: Yes
Instructions:
1. Review Microsoft Security Update Guide for CVE-2025-29826
2. Apply the latest security updates for Microsoft Dataverse
3. Restart affected services/servers
4. Verify update installation
🔧 Temporary Workarounds
Implement Least Privilege Access
allRestrict user permissions to minimum required for their role
Enhanced Monitoring
allMonitor for unusual privilege escalation attempts
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Dataverse from critical systems
- Enforce multi-factor authentication and review all user permissions regularly
🔍 How to Verify
Check if Vulnerable:
Check Dataverse version against Microsoft Security Update GuideCheck Version:
Check through Microsoft 365 admin center or PowerShell: Get-InstalledModule -Name Microsoft.PowerApps.Administration.PowerShellVerify Fix Applied:
Verify installed updates include the patch for CVE-2025-29826📡 Detection & Monitoring
Log Indicators:
- Unusual permission changes
- Failed authorization attempts followed by successful elevated access
- User accounts accessing resources beyond their normal permissions
Network Indicators:
- Unusual API call patterns to Dataverse endpoints
- Traffic from user accounts to administrative endpoints
SIEM Query:
source="dataverse" AND (event_type="permission_change" OR event_type="authorization_failure")