CVE-2026-20960
📋 TL;DR
This vulnerability in Microsoft Power Apps allows authenticated attackers to execute arbitrary code remotely due to improper authorization checks. It affects organizations using Power Apps with network-accessible instances. Attackers can leverage this to compromise Power Apps environments and potentially access sensitive data.
💻 Affected Systems
- Microsoft Power Apps
📦 What is this software?
Power Apps by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Power Apps environment leading to data exfiltration, lateral movement to connected systems, and persistent backdoor installation.
Likely Case
Unauthorized code execution allowing attackers to access sensitive business data stored in Power Apps, modify applications, or disrupt operations.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring in place to detect exploitation attempts.
🎯 Exploit Status
Requires authenticated access but authorization bypass allows escalation. Network access to Power Apps instance needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific version
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20960
Restart Required: Yes
Instructions:
1. Review Microsoft Security Update Guide for CVE-2026-20960. 2. Apply latest Power Apps updates via Microsoft Update or admin center. 3. Restart affected services/servers. 4. Verify patch application.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Power Apps instances to authorized users only
Enhanced Authentication
allImplement multi-factor authentication and strict access controls for Power Apps
🧯 If You Can't Patch
- Isolate Power Apps instances from internet and restrict internal network access
- Implement application-level monitoring and alerting for suspicious Power Apps activities
🔍 How to Verify
Check if Vulnerable:
Check Power Apps version against Microsoft Security Update Guide for CVE-2026-20960Check Version:
Check via Power Platform admin center or PowerShell: Get-PowerAppEnvironmentVerify Fix Applied:
Verify Power Apps version is updated to patched version specified in Microsoft advisory📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns to Power Apps
- Unexpected code execution or deployment events in Power Apps logs
- Authorization failure logs followed by successful access
Network Indicators:
- Unusual network traffic to Power Apps ports from unexpected sources
- Suspicious API calls to Power Apps endpoints
SIEM Query:
source="PowerApps" AND (event_type="code_execution" OR auth_result="failure") | stats count by user, source_ip