Microsoft has released emergency SharePoint security updates for two zero-day vulnerabilities tracked as CVE-2025-53770 and CVE-2025-53771 that have compromised services worldwide in “ToolShell” attacks.<\/p>\n\n\n\n
In May, during the Berlin Pwn2Own hacking contest<\/a>, researchers exploited a zero-day vulnerability chain called “ToolShell,” which enabled them to achieve remote code execution in Microsoft SharePoint.<\/p>\n\n\n\n These flaws were fixed as part of the July Patch Tuesday updates<\/a>; However, threat actors were able to discover two zero-day vulnerabilities that bypassed Microsoft’s patches for the previous flaws.<\/p>\n\n\nMicrosoft releases emergency patches for SharePoint RCE flaws exploited in attacks<\/a>: Microsoft releases emergency patches for SharePoint RCE flaws exploited in attacks<\/span><\/a>","protected":false},"excerpt":{"rendered":" Microsoft has released emergency SharePoint security updates for two zero-day vulnerabilities tracked as CVE-2025-53770 and CVE-2025-53771 that have compromised services worldwide in “ToolShell” attacks. In May, during the Berlin Pwn2Own hacking contest, researchers exploited a zero-day vulnerability chain called “ToolShell,” which enabled them to achieve remote code execution in Microsoft SharePoint. These…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[40,13],"class_list":["post-707","post","type-post","status-publish","format-standard","hentry","category-vulnerability","tag-40","tag-china"],"_links":{"self":[{"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts\/707","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/comments?post=707"}],"version-history":[{"count":1,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts\/707\/revisions"}],"predecessor-version":[{"id":708,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts\/707\/revisions\/708"}],"wp:attachment":[{"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/media?parent=707"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/categories?post=707"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/tags?post=707"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}