NSA Cybersecurity Advisories & Guidance


NSA leverages its elite technical capability to develop advisories and mitigations on evolving cybersecurity threats.

Browse or search our repository of advisories, info sheets, tech reports, and operational risk notices listed below. Some resources have access requirements.

For a subset of cybersecurity products focused on telework and general network security for end users, view our Telework and Mobile Security Guidance page here.

ImageTitlePublication Date
 DDD-190716-288-053.PDFAdvisory: Guidance For Vulnerabilities Affecting Modern Processors - Update 2 (May 2019)5/1/2019
 DDD-190716-967-086.PDFInfo Sheet: Limiting ptrace on Production Linux Systems (May 2019)5/1/2019
 DDD-190716-858-060.PDFAdvisory: Patch Remote Desktop Services On Legacy Versions of Windows (June 2019)6/1/2019
 DDD-190716-296-078.PDFInfo Sheet: Defending Your DNS Infrastructure (June 2019)6/1/2019
 DDD-190716-221-082.PDFInfo Sheet: Boot Security Modes Recommendations (June 2019)6/1/2019
 Info Sheet: Top 10 Mitigation Strategies (March 2018)7/16/2019
 Info Sheet: Update and Upgrade Software Immediately (August 2019)8/30/2019
 Info Sheet: Segment Networks and Deploy Application-Aware Defenses (September 2019)8/30/2019
 Info Sheet: Actively Manage Systems and Configurations (August 2019)8/30/2019
 Info Sheet: Defend Privileges and Accounts (August 2019)8/30/2019
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Additional Documents

Some guidance is protected and requires use of a DoD Common Access Card (CAC) to access. Visit https://cyber.mil/nsa/cybersecurity-advisories-and-technical-guidance/ to access the following and other protected documents:

  • Avoid Dangers of Wildcard TLS Certificates and the ALPACA Technique (FOUO version)
  • Protecting VSAT Communications
  • Quantum Security of Symmetric Cryptography and Hash Functions: A Review
  • Securing AWS S3
  • Security Considerations for Office 365 Government Customers