{"id":4256,"date":"2026-09-04T18:46:21","date_gmt":"2026-09-04T10:46:21","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-66402"},"modified":"2026-09-04T18:46:21","modified_gmt":"2026-09-04T10:46:21","slug":"cve-2026-66402","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-66402","title":{"rendered":"CVE-2026-66402 [CRITICAL] &#8211; FreeRDP before 3.29.0 (affected versions"},"content":{"rendered":"<p>FreeRDP before 3.29.0 (affected versions &lt;= 3.28.0) contains multiple TLS certificate identity validation weaknesses in tls_verify_certificate(), tls_match_hostname(), and x509_utils_get_dns_names(). Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL&#039;s length-aware identity validation APIs, it (1) truncates DNS SAN values at embedded NUL bytes (accepting e.g. &#039;victim.example.attacker.example&#039; as &#039;victim.example&#039;), (2) accepts a matching Common Name even when non-matching DNS SAN entries are present, and (3) accepts IP-literal targets via DNS\/CN matching without comparing iPAddress SANs. Under a trusted or misissued certificate chain, an attacker positioned to present such a certificate can bypass server identity verification, weakening TLS server authentication.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>FreeRDP before 3.29.0 (affected versions<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-4256","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/4256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}