By February 2018, Office 2013 was in its phase. Updates during this period focused almost exclusively on security vulnerabilities and critical bug fixes.
Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher, InfoPath, and Lync. February 2018 Updates Context Office 2013 Professional Plus SP1 Feb 2018 Down...
A specific update from January 2, 2018 (KB3172510), improved the thesaurus and general stability across all Office products. Installation & Troubleshooting Description of Microsoft Office 2013 Service Pack 1 (SP1) By February 2018, Office 2013 was in its phase
Enhanced support for Windows 8.1 and Internet Explorer 11. February 2018 Updates Context A specific update from
Improved performance on high-DPI devices and precision touchpads.
Service Pack 1 is a cumulative roll-up of all security and performance updates released prior to its publication, as well as specific improvements for modern systems.
Updates from early 2018 addressed vulnerabilities that could allow remote code execution if a user opened a malicious file.