Security researchers and enterprise defenders are scrambling to respond after Microsoft disclosed that attackers are actively exploiting a newly discovered vulnerability in on-premises Microsoft Exchange Server deployments, potentially allowing threat actors to execute malicious scripts through specially crafted emails.<\/p>\n\n\n\n
The vulnerability, identified as CVE-2026-42897<\/strong><\/a>, carries a CVSS severity score of 8.1 and affects multiple versions of Microsoft Exchange Server used inside corporate environments worldwide. According to Microsoft, the flaw stems from improper neutralization of user-supplied input during web page generation \u2014 a class of weakness more commonly associated with cross-site scripting (XSS) vulnerabilities.<\/p>\n\n\n(4) Microsoft Warns of Active Exploitation Targeting On-Premises Exchange Servers Through Malicious Emails | LinkedIn<\/a>: Microsoft Warns of Active Exploitation Targeting On-Premises Exchange Servers Through Malicious Emails<\/span><\/a>\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" Security researchers and enterprise defenders are scrambling to respond after Microsoft disclosed that attackers are actively exploiting a newly discovered vulnerability in on-premises Microsoft Exchange Server deployments, potentially allowing threat actors to execute malicious scripts through specially crafted emails. The vulnerability, identified as CVE-2026-42897, carries a CVSS severity score of…<\/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":[72],"class_list":["post-1028","post","type-post","status-publish","format-standard","hentry","category-vulnerability","tag-72"],"_links":{"self":[{"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts\/1028","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=1028"}],"version-history":[{"count":1,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts\/1028\/revisions"}],"predecessor-version":[{"id":1029,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/posts\/1028\/revisions\/1029"}],"wp:attachment":[{"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/media?parent=1028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/categories?post=1028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/familiebuckens.nl\/index.php\/wp-json\/wp\/v2\/tags?post=1028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}