Windows Antivirus | April 2026 | Platform 4.18.26040.7 | Engine 1.1.26040.8
Analysis / inference: Microsoft released the April/May 2026 Defender platform and engine updates addressing three vulnerabilities, including a critical RCE.
- Dates
- Source and collection dates not recorded
- Source
- Microsoft Defender for Endpoint releases · Limited verification
- Classification
- Microsoft Security
Section 01 · Summary analysis
Microsoft released Defender Platform version 4.18.26040.7 and Engine version 1.1.26040.8, which introduce performance improvements, Device Control throttling reductions, and fixes for three CVEs.
AI summary / analysis; claims are not independently verified. Check the primary source before acting.
Section 02 · Analysis
SecOps Signal analysisThis release addresses three specific vulnerabilities within Microsoft Defender, including a critical remote code execution flaw and an important elevation of privilege issue, requiring platform and engine updates across endpoints.
Endpoints must update their Defender engine and platform binaries to mitigate the fixed security issues.
Section 03 · Recommended actions
- Update Microsoft Defender for Endpoint platform to 4.18.26040.7 and engine to 1.1.26040.8
- Ensure security intelligence updates are current
- Verify the deployed Microsoft Defender platform version is at least 4.18.26040.7
- Confirm the Microsoft Defender engine version is at least 1.1.26040.8
- Check endpoint update channels for successful deployment of the May 2026 releases