{"id":5033,"date":"2026-01-05T08:00:00","date_gmt":"2026-01-05T06:00:00","guid":{"rendered":"https:\/\/support.withsecure.com\/?post_type=changelog&#038;p=5033"},"modified":"2026-10-19T12:16:20","modified_gmt":"2026-10-19T09:16:20","slug":"countercept-agent-for-windows-2026-01-05-ultralight-core-update","status":"publish","type":"changelog","link":"https:\/\/support.withsecure.com\/en\/changelogs\/countercept-agent-for-windows-2026-01-05-ultralight-core-update\/","title":{"rendered":"Countercept Agent for Windows &#8211; 2026-01-05 &#8211; Ultralight Core update"},"content":{"rendered":"<p>The update is related to the Countercept Agent\u2019s Ultralight Core. Ultralight Core provides low-level functionality such as file hash calculation as part of the agent\u2019s reporting of endpoint activity.<\/p>\n<p>Product Name: Countercept Agent for Windows &#8211; Ultralight Core<\/p>\n<p>Version: 2.1.21134<\/p>\n<p>Pilot Availability: 07\/01\/2026<\/p>\n<p>General Availability: 14\/01\/2026<\/p>\n<p>Predecessor: 2.1.21067<\/p>\n<p>Release Purpose:<\/p>\n<ul>\n<li>General maintenance<\/li>\n<\/ul>\n<p>Customer Action Required:<\/p>\n<ul>\n<li>The Operating System should be Azure Code Signing (ACS) compliant to receive this update. See <span class=\"js-embed embedResponsive inlineEmbed\"><br \/>\n    <a href=\"https:\/\/community.withsecure.com\/en\/kb\/articles\/29714-changes-in-support-on-microsoft-windows-minimum-patch-level\" rel=\"nofollow noopener ugc\" target=\"_blank\"><br \/>\n        https:\/\/community.withsecure.com\/en\/kb\/articles\/29714-changes-in-support-on-microsoft-windows-minimum-patch-level<br \/>\n    <\/a><br \/>\n<\/span><br \/>\n for more details.<br \/>\nAny endpoints which are not ACS-compliant will continue to run the older version of the Ultralight Core (2.1.16183).<\/li>\n<\/ul>\n<p>Name Changes:<\/p>\n<ul>\n<li>No changes to file, process, or service names.<\/li>\n<\/ul>\n<p>Files Updated:<\/p>\n<ul>\n<li>CapricornScanner.exe<\/li>\n<li>fshoster64.exe<\/li>\n<li>fsulgk.sys<\/li>\n<li>install.exe<\/li>\n<li>uninstall.exe<\/li>\n<\/ul>\n<p>New Features and Enhancements:<\/p>\n<ul>\n<li>N\/A<\/li>\n<\/ul>\n<p>General Maintenance:<\/p>\n<ul>\n<li>General maintenance of functionality not utilized by Countercept.<\/li>\n<\/ul>\n<p>OS Support:<\/p>\n<ul>\n<li>Windows 10, 11<\/li>\n<li>Windows Server 2012, 2012 R2, 2016, 2019, 2022, 2025<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The update is related to the Countercept Agent\u2019s Ultralight Core. Ultralight Core provides low-level functionality such as file hash calculation as part of the agent\u2019s reporting of endpoint activity. Product&hellip;<\/p>\n","protected":false},"template":"","changelog_product":[134],"class_list":["post-5033","changelog","type-changelog","status-publish","hentry"],"acf":{"release_date":"20260105","version":"","source_system":"vanilla-import","source_foreign_id":"","import_hash":"76efbb4728df6a38f738e44d3f96a6d6d8567863","vanilla_article_id":32790,"legacy_author":"AleksandrG","vanilla_url":"https:\/\/community.withsecure.com\/changelogs-en\/kb\/articles\/32790-countercept-agent-for-windows-2026-01-05-ultralight-core-update","vanilla_category_id":191,"machine_translated":false},"_links":{"self":[{"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/changelog\/5033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/changelog"}],"about":[{"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/types\/changelog"}],"wp:attachment":[{"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/media?parent=5033"}],"wp:term":[{"taxonomy":"changelog_product","embeddable":true,"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/changelog_product?post=5033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}