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
 CSI_MULTIFACTOR_AUTHENTICATION_SOLUTIONS_UOO17091520.PDFInfo Sheet: Multifactor Authentication Solutions (October 2020 update)10/16/2020
 CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDFCybersecurity Advisory: Chinese State-Sponsored Actors Exploit Publicly Known Vulnerabilities (October 2020)10/20/2020
 Info Sheet: Mobile Device Best Practices (October 2020)10/23/2020
 CSI_ SELECTING_AND_USING_COLLABORATION_SERVICES_SECURELY_FULL_20200814.PDFInfo Sheet: (Full) Selecting and Safely Using Collaboration Services for Telework (November 2020 update)11/5/2020
 CSI_ SELECTING_AND_USING_COLLABORATION_SERVICES_SECURELY_SHORT_20200814.PDFInfo Sheet: (Abridged) Selecting and Safely Using Collaboration Services for Telework (November 2020 update)11/5/2020
 CSA_VMWARE ACCESS_U_OO_195076_20.PDFCybersecurity Advisory: Russian State-Sponsored Actors Exploiting Vulnerability in VMware Workspace ONE Access Using Compromised Credentials (December 2020)12/7/2020
 AUTHENTICATION_MECHANISMS_CSA_EXEC_U_OO_198854_20.PDFCybersecurity Advisory: (Abridged) Detecting Abuse of Authentication Mechanisms (December 2020)12/17/2020
 AUTHENTICATION_MECHANISMS_CSA_U_OO_198854_20.PDFCybersecurity Advisory: (Full) Detecting Abuse of Authentication Mechanisms (December 2020)12/17/2020
 ELIMINATING_OBSOLETE_TLS_UOO197443-20.PDFInfo Sheet: Eliminating Obsolete TLS Protocol Configurations (January 2021)1/5/2021
 Info Sheet: Adopting Encrypted DNS in Enterprise Environments (January 2021)1/14/2021
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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