America's Cyber Defense Agency and National Coordinator for Critical Infrastructure Security & Resilience. Likes, reshares, follows ≠ endorsements.

Washington, DC
Joined February 2018
Do you know how to respond to a bomb threat? CISA provides resources to enhance the nation’s ability to prevent, protect against, respond to, and mitigate the use of explosives. Learn more: cisa.gov/topics/physical-sec…
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On this this Global Encryption Day, we wouldn’t want to imagine a world without encryption. Strong end to end encryption helps keep our critical infrastructure safe. Learn more: go.dhs.gov/5rU #GlobalEncryptionDay #CybersecurityAwarenessMonth
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Cybersecurity and Infrastructure Security Agency retweeted
🚨 Organizations should immediately patch critical PHP vulnerabilities CVE-2026-109618 and CVE-2026-109619. These vulnerabilities enable unauthenticated #RCE and affect PHP installations serving web requests. Learn more: 🔗 go.dhs.gov/5Hi
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We’re live in an hour! Join CISA’s experts for ‘How to Build a Career in Cybersecurity’—ask your questions and learn how a cyber career can help you make an impact: linkedin.com/events/75143906…
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🇺🇸🤝🇦🇷 Strong partnerships build stronger cyber defenses. Acting Dir Nick Andersen met with @innovacionar's State Secretary for Science & Technology, Adriana Baravalle, to discuss cybersecurity cooperation and resilience. ¡Hacemos un gran equipo!
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Logging activity helps detect threats early and builds a baseline for the next 250 years of security. Preparedness means monitoring and responding quickly to potential incidents. Learn how to monitor key information: cisa.gov/cybersecurity-aware… #SecuringTheNext250
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We’ve released a new advisory w/ @FBI, @SecretService & partners to help orgs detect + defend against prolific SafePay ransomware activity targeting businesses & multiple #CriticalInfrastructure sectors worldwide. Learn how to protect your org today 👉 go.dhs.gov/5rL
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⏰ REMINDER! We’re hosting a CISA Live! tomorrow at 1 PM ET. Bring your questions for our experts and learn about skills, training, and career options in cybersecurity: linkedin.com/events/75143906…
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Cybersecurity and Infrastructure Security Agency retweeted
NSA joined @NIST and @CISACyber in releasing guidelines for managing SI control incidents. Organizations utilizing SI are encouraged to adopt these practices. Read the joint report: media.defense.gov/2026/Oct/1…
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All election offices should have procedures in place to handle mail safely and respond to potentially hazardous materials exposure. Get started with our guide and ensure employees are properly trained: go.dhs.gov/5ri
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Acting Dir Nick Andersen met with Lt. Gen. Michelle McGuinness, Australia’s National Cyber Security Coordinator, to discuss Cyber Storm X—CISA’s national level exercise that strengthens incident response & collective readiness. Learn more: go.dhs.gov/5zU
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Cyber disruptions don’t stop in IT systems; they affect power grids, water utilities & supply chains. Join us Oct. 26 for a #CISALive as we bridge Cybersecurity Awareness Month into Critical Infrastructure Security & Resilience Month. Register: linkedin.com/events/75180356…
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ADIR Nick Andersen joined #InfoSecWorld for a keynote fireside chat: "Inside CISA: Priorities, Threats and the Future." He discussed how CISA is working with public & private sector partners to address emerging cyber threats & improve our collective cyber defense.
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Join us for the ChemLock: Introduction to Chemical Security Training Course on October 27th, 2026, from 12:00-2:00 PM ET. Learn how to enhance chemical security at your facility and protect your community. 📅 Register now: cisa.gov/resources-tools/pro…
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Cybersecurity and Infrastructure Security Agency retweeted
#K12CybersecurityTip: Back up your data and regularly test your backups. These actions can help reduce the impact of ransomware and other damaging cyberattacks. Get 9️⃣ more cybersecurity tips for educators from @usedgov: go.dhs.gov/wW8
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In a new fireside chat, Acting Director Nick Andersen discussed how Super Intelligence is accelerating cyber threats against critical infrastructure and how defenders can adapt through risk-based decision-making, partnership & innovation. 🎥 youtu.be/AzGPyq8P_04
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Cybersecurity is a dynamic field, offering a role for everyone. We’re celebrating Cybersecurity Careers Week by recognizing the vital role the cybersecurity workforce plays in protecting our nation! Explore careers with CISA: cisa.gov/careers
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Acting Dir Nick Andersen met with Stephanie Crowe, Head of @ASDGovAu's Australian Cyber Security Centre, to strengthen collaboration on critical infrastructure resilience. They discussed CI Fortify & shared efforts to help essential services recover from crises. 🇺🇸🇦🇺
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Mail is a key component of standard office operations and mail balloting across the country. Our guide provides offices and personnel with clear procedures to handle mail safely and respond effectively to potentially suspicious mail. Get started: go.dhs.gov/5ri
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