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US-CERT stands for the United States Computer Emergency Readiness Team. It was a U.S. government cyber response and information-sharing capability; the US-CERT brand was retired in 2019 as the Cybersecurity and Infrastructure Security Agency (CISA) unified its capabilities.
What did US-CERT do?
A Department of Homeland Security (DHS) report describing the 2012 context called US-CERT a “24×7 operational entity” that collected and analyzed data, then shared information with federal agencies, state and local partners, and domestic and international organizations. That phrase describes the operation at the time of the report; it should not be taken as confirmation of current hours or services. Read the US-CERT Security Trends Report.
A 2010 DHS publication described US-CERT as providing response support and cyberattack defense for Federal Civilian Executive Branch (.gov) networks, while collaborating with state and local governments, industry, and international partners. This is a historical description of its role and scope, not a current service directory. Read the DHS publication.
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CISA’s organizational timeline says the agency unified its capabilities in 2019 and retired the US-CERT and ICS-CERT brands. See CISA’s timeline. The available sources support describing US-CERT as a historical name and capability; they do not establish it as a current standalone CISA unit or public-facing brand.
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The acronym still appears in later reference material. For example, a March 2025 CISA framework lists US-CERT as “United States Computer Emergency Readiness Team.” That use preserves the name; by itself, it does not show that a separate organization remains active. See the CISA reference framework.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the name means—and what it does not mean
The official expansion uses “Readiness,” not “Response.” US-CERT refers to the U.S. government capability described above; it should not be used as a generic name for every computer emergency response team. The cited materials also do not establish that US-CERT and CERT/CC are the same organization.
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