Microsoft to Block External Script Injection Attacks in Entra ID Starting October 2026
Enhanced protections aim to secure authentication flows against malicious script injection
Key Takeaways
- Microsoft will implement enhanced protections against external script injection in Entra ID starting October 2026.
- No active exploitation of Entra ID script injection has been reported to date.
- The advisory is preventive in nature, aimed at securing authentication flows.
- Specific technical details and configuration changes are not yet fully disclosed.
- Customers should monitor official Microsoft channels for rollout details and configuration guidance.
Quick answers
- What happened?
- Microsoft has announced that the Entra ID authentication system will receive enhanced protections against external script injection attacks beginning in October 2026. The advisory, reported by BleepingComputer, serves as a preventive measure with no active exploitation currently reported.
- Which products are affected?
- Entra ID
- What should defenders do?
- Customers should monitor official Microsoft announcements for specific configuration changes and mitigation measures as the October 2026 rollout approaches. No immediate action required beyond standard Entra ID maintenance practices.
Microsoft has reminded customers that the Entra ID authentication system will get better protection against external script injection attacks starting next month. According to a report from BleepingComputer published on September 30, 2026, the update will block external script injection attempts targeting Entra ID authentication flows. The company stated that no active exploitation of this vector has been reported in the wild, and the advisory is being issued proactively to prevent future attacks. Details regarding the specific configuration changes or technical implementation of the enhanced protections are pending official announcement. Entra ID remains a core identity and access management platform for organizations using Microsoft cloud services. Customers are advised to monitor official Microsoft announcements for specific configuration requirements and mitigation steps as the October 2026 rollout approaches.
Security Details
Microsoft will implement enhanced protections in the Entra ID authentication system starting October 2026 to block external script injection attacks. No active exploitation has been reported. Specific technical details and configuration requirements are pending official announcement.
Affected products
Entra ID
Mitigation
Customers should monitor official Microsoft announcements for specific configuration changes and mitigation measures as the October 2026 rollout approaches. No immediate action required beyond standard Entra ID maintenance practices.
Sources
BleepingComputer
Microsoft to block Entra ID script injection attacks starting October
Sep 30, 2026 · 13:37
Original link
Related Security News
Attackers Abuse MSP360 RMM to Deploy ScreenConnect in Dual-RMM Phishing Campaigns
Microsoft has warned of phishing campaigns distributing an installer for the MSP360 Remote Monitoring and Management (RMM) software under the guise of meeting invitations, PDF-themed lures, software update prompts, and other social-engineering content. Once executed, the legitimate MSP360 installer establishes remote management access on affected endpoints, and ScreenConnect is subsequently deployed to provide dual-RMM persistence. The campaigns leverage deceptive file names and social-engineering themes to trick users into executing the installer. No zero-day vulnerabilities are exploited; the attack relies on user execution. Microsoft and MSP360 advise user vigilance, email filtering, and verifying software sources, and recommend keeping MSP360 and ScreenConnect updated to the latest versions.
_Dzmitry_Skazau_Alamy.jpg?width=720&quality=80&disable=upscale)