What Is CISA (Cybersecurity and Infrastructure Security Agency)?

Updated

CISA is the U.S. Cybersecurity and Infrastructure Security Agency, which describes itself as "America's Cyber Defense Agency." Its mission centers on strengthening cybersecurity and protecting critical infrastructure, and it publishes guidance, advisories, and resources for organizations and the public. Use this overview if you want to understand what CISA does and how to find its practical materials; it is not a substitute for the specific guidance documents themselves.

What CISA does

CISA's public-facing work falls into a few recurring categories visible on its site:

  • Joint guidance and best practices. CISA co-releases products with partners such as NIST and NSA. One example is a joint product outlining ten voluntary practices for incident readiness and response, aligned with cyber incident response best practices, aimed at organizations that train and evaluate super intelligence (SI) agents.
  • Threat advisories. CISA, the FBI, and partners publish joint advisories describing threat actor tactics, techniques, and procedures, indicators of compromise, and mitigations. A recent example covers a Chinese-government-linked threat group using automated and hands-on hacking tools to target networks worldwide.
  • Sector-specific resources. CISA publishes material for specific communities, such as a fact sheet for critical infrastructure organizations working with third-party ICS integrators to define secure practices and frameworks.
  • Program quality and standards work. CISA releases white papers on programs it runs, such as one detailing the four dimensions of quality for the CVE Program, which aims to keep vulnerability data consistent, reliable, and actionable.
  • Awareness campaigns and planning documents. CISA runs Cybersecurity Awareness Month each October with resources for organizations, and publishes plans such as its 2026 Election Infrastructure Security Plan describing no-cost, voluntary services for securing election infrastructure.

Who it is for

CISA's materials are written for organizations rather than individuals: critical infrastructure operators, election partners, security teams, and vendors that integrate with operational technology. The guidance is generally framed as voluntary practices and services, not mandates. If you are looking for a starting point on a specific risk area, the site organizes content around news updates, operational information, and additional resources.

How to use the site

  1. Start with the latest updates. The homepage's News Updates and Latest Operational Information sections list recent press releases, advisories, and guidance in reverse chronological order, so you can see what changed most recently.
  2. Match the format to your need. Advisories give threat details and mitigations; fact sheets and white papers explain practices and program quality; campaign pages collect awareness resources.
  3. Follow the linked guidance. Each item links to the full document ("Read the Guidance," "Read the Advisory," "Read the Factsheet"), which is where the actionable detail lives.
  4. Subscribe for updates. CISA offers subscription and RSS options for updates, which is useful if you need to track new advisories without checking the site manually.

What to keep in mind

  • Voluntary, not regulatory. The practices described in CISA's products are framed as voluntary; check each document for its own scope.
  • Partnership products. Many advisories are joint releases with the FBI, NSA, NIST, or international partners, so attribution and scope vary by document.
  • Currency matters. Threat advisories and plans are dated; confirm you are reading the current version before acting on technical details.