Glossary

Extended Security Updates (ESU)

A paid program under which a vendor continues shipping security patches for an operating system or product after its official end of support, typically for a limited number of years. ESU exists because large fleets cannot migrate on schedule; systems without it accumulate unpatched, publicly known vulnerabilities.

// Recent coverage mentioning Extended Security Updates (ESU)

TH

INFO

Threat Intel

Windows 10 ESU Extended to 2027: Security Implications

Microsoft extends free Windows 10 Extended Security Updates (ESU) for consumers until October 2027. Understand the security implications and planning for end-of-life.

Runtime Rebel Intel

4 min read · Jun 25, 2026

← All 285 glossary terms