Cybersecurity and Infrastructure Security Agency
@CISAgov
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Official communications from CISA on X will always originate from this account. No other accounts are authorized to convey info from CISA or senior CISA staff.
Washington, DC
Joined February 2018
We’re celebrating America’s 249th birthday early by reflecting on our nation’s rich history and enduring strength. We’re honored to serve you! The countdown to 250 starts now – Happy Birthday, America! 🇺🇸
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As cyber threats continue to evolve, inadequate security may expose organizations to increased risks and higher operational costs. Check out our guidance to help make secure and informed choices when procuring digital products and services:
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RT @CISACyber: 🛡️ We added Google Chromium V8 type confusion vulnerability CVE-2025-6554 to our Known Exploited Vulnerabilities Catalog. Vi….
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RT @CISAMarci: Thanks @foxandfriends for sharing our message on the recent so called “cyber attack” by Iran-linked hackers targeting @POTUS….
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Thanks to our government and industry partners for joining us at our Emergency Support Function 2 communications tabletop exercise in the Commonwealth of Puerto Rico. We discussed ways to improve preparedness, response, and restoration activities following disasters.
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Our #SkillingAcademy is accepting applications for the remaining FY25 courses. Learn skills to bolster federal civilian network defense such as identifying & mitigating threats across networks, designing, developing & deploying AI applications. Apply here:
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Iran-linked hackers have threatened to disclose more emails stolen from U.S. President Donald Trump's circle, after distributing a prior batch to the media ahead of the 2024 U.S. election.
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🛡️As Internet Safety Month closes out, remember that info sharing plays a critical role in our nation's critical infrastructure defense! Reporting cyber incidents benefits us all since cyber incidents have the potential to impact the economy, public health, & national security.
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RT @EPAregion3: 🏁 EPA's Mission Hits the Fast Lane. EPA is safeguarding public health, even at the racetrack! 🌍💪 Our On-Scene Coordinators….
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RT @DepSec_Edgar: It was my honor to address the @MWDOC as the keynote speaker for their Policy Forum and Dinner in Orange County, Californ….
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RT @DepSec_Edgar: Our most critical infrastructure is often something we take for granted – from reliable and clean water to the constant f….
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RT @DC3Forensics: #CyberNews .DC3 and our partners are encouraging #cyber vigilance and stand ready to protect our national cybersecurity!….
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Take these steps to protect your organization:. · Identify and disconnect OT and ICS devices from the public internet. · Protect devices and accounts with strong, unique passwords. · Apply the latest software patches. · Implement phishing-resistant MFA for access to OT networks.
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At this time, we have not seen indications of a coordinated campaign of malicious cyber activity in the U.S. that can be attributed to Iran. However, we urge you to step up your defense. If you notice unusual activity on your network, report it to:
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Iranian-affiliated cyber actors and hacktivist groups may conduct malicious cyber activity. Read our joint fact sheet to defend against potential targeted cyber threats:
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We recently attended the @NJUtilities Conference, presenting an overview of our no-cost services to key industry partners including water, wastewater, electric, natural gas, and telecommunications providers. Check out our free services:
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