{"id":5171,"date":"2026-05-29T08:00:00","date_gmt":"2026-05-29T05:00:00","guid":{"rendered":"https:\/\/support.withsecure.com\/?post_type=changelog&#038;p=5171"},"modified":"2026-10-19T11:44:44","modified_gmt":"2026-10-19T08:44:44","slug":"countercept-agent-for-windows-2026-05-29-ultralight-core-update","status":"publish","type":"changelog","link":"https:\/\/support.withsecure.com\/en\/changelogs\/countercept-agent-for-windows-2026-05-29-ultralight-core-update\/","title":{"rendered":"Countercept Agent for Windows &#8211; 2026-05-29 &#8211; Ultralight Core update"},"content":{"rendered":"<p>Update to previous release schedule and version<\/p>\n<p>\u00a0<\/p>\n<p>Windows agent&#8217;s Ultralight Core release planned for General Available\u00a0release on Monday, 8th of June 2026, has been cancelled due to an issue found during the Pilot phase. We apologize for the delays related to this particular release, but we are committed to making sure that we release content with the highest possible quality.\u00a0<\/p>\n<p>\u00a0<\/p>\n<p>A new version of Ultralight Core (2.1.22029) that fixes the issue\u00a0found will be delivered to Pilot group endpoints on Monday, the 8th of June 2026, with a General Availability (GA) release on Monday, the 15th of June 2026.<\/p>\n<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: <s>2.1.21987<\/s> \/ 2.1.22029<\/p>\n<p>Pilot Availability: <s>01\/06\/2026<\/s> \/ 08\/06\/2026<\/p>\n<p>General Availability: <s>08\/06\/2026<\/s> \/ 15\/06\/2026<\/p>\n<p>Predecessor: 2.1.21833<\/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\u00a0<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\u00a0\u00a0\u00a0\u00a0for 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>fshoster64.exe<\/li>\n<li>FsPisces.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>Update to previous release schedule and version \u00a0 Windows agent&#8217;s Ultralight Core release planned for General Available\u00a0release on Monday, 8th of June 2026, has been cancelled due to an issue&hellip;<\/p>\n","protected":false},"template":"","changelog_product":[134],"class_list":["post-5171","changelog","type-changelog","status-publish","hentry"],"acf":{"release_date":"20260529","version":"","source_system":"vanilla-import","source_foreign_id":"","import_hash":"36adde613efd3f9f40859ca16a1b229368332edc","vanilla_article_id":32947,"legacy_author":"sebsan","vanilla_url":"https:\/\/community.withsecure.com\/changelogs-en\/kb\/articles\/32947-countercept-agent-for-windows-2026-05-29-ultralight-core-update","vanilla_category_id":191,"machine_translated":false},"_links":{"self":[{"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/changelog\/5171","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=5171"}],"wp:term":[{"taxonomy":"changelog_product","embeddable":true,"href":"https:\/\/support.withsecure.com\/en\/wp-json\/wp\/v2\/changelog_product?post=5171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}