{"id":15880,"date":"2025-07-22T19:09:21","date_gmt":"2025-07-22T22:09:21","guid":{"rendered":"https:\/\/www.bs4it.com.br\/?p=15880"},"modified":"2025-07-22T19:09:23","modified_gmt":"2025-07-22T22:09:23","slug":"ataque-zero-day-atinge-sharepoint-da-microsoft-e-expoe-falha-grave","status":"publish","type":"post","link":"https:\/\/www.bs4it.com.br\/en\/ataque-zero-day-atinge-sharepoint-da-microsoft-e-expoe-falha-grave\/","title":{"rendered":"Ataque zero-day atinge SharePoint da Microsoft e exp\u00f5e falha grave"},"content":{"rendered":"\n[et_pb_section fb_built=”1″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font_size=”20px” text_line_height=”1.4em” header_font=”–et_global_body_font||||||||” header_font_size=”34px” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]

Se sua empresa utiliza o SharePoint Server, este alerta \u00e9 para ontem. A Microsoft confirmou uma nova falha cr\u00edtica \u2014 identificada como CVE-2025-53770, <\/strong>que j\u00e1 est\u00e1 sendo ativamente explorada por cibercriminosos e atingiu \u00f3rg\u00e3os governamentais, universidades, empresas de energia e at\u00e9 uma operadora asi\u00e1tica de telecomunica\u00e7\u00f5es.<\/p>\n

 <\/p>\n

Com pontua\u00e7\u00e3o CVSS de 9.8<\/strong>, essa vulnerabilidade \u00e9 considerada extremamente grave. E o pior: ainda n\u00e3o h\u00e1 patch dispon\u00edvel.<\/p>\n

 <\/p>\n

Entenda o que est\u00e1 acontecendo<\/h2>\n

A falha \u00e9 uma variante da conhecida \u201cToolShell\u201d, <\/strong><\/em>ligada a campanhas de espionagem e se conecta \u00e0s vulnerabilidades CVE-2025-49704<\/strong> e CVE-2025-49706<\/strong>, j\u00e1 monitoradas por pesquisadores de seguran\u00e7a da Palo Alto Networks.<\/p>\n

 <\/p>\n

Segundo relatos do grupo de seguran\u00e7a do Google, os ataques incluem:<\/h2>\n

 <\/p>\n

    \n
  • Instala\u00e7\u00e3o de Webshells para controle remoto;<\/li>\n
  • Extra\u00e7\u00e3o de dados criptogr\u00e1ficos, com acesso persistente n\u00e3o autenticado;<\/li>\n
  • Comprometimento ativo de dezenas de sistemas entre os dias 18 e 19 de julho.<\/li>\n<\/ul>\n

     <\/p>\n

    A vulnerabilidade foi adicionada no cat\u00e1logo oficial da CISA (Ag\u00eancia de Seguran\u00e7a Cibern\u00e9tica dos EUA) em 20 de julho, refor\u00e7ando a urg\u00eancia da resposta.<\/p>\n

     <\/p>\n

    O que sua empresa pode (e deve) fazer agora<\/strong><\/h2>\n

    Embora a Microsoft ainda esteja desenvolvendo uma atualiza\u00e7\u00e3o de seguran\u00e7a, as organiza\u00e7\u00f5es precisam agir imediatamente para mitigar os riscos:<\/p>\n

     <\/p>\n

    Medidas recomendadas:<\/strong><\/p>\n

      \n
    • Ativar a integra\u00e7\u00e3o com o AMSI (Antimalware Scan Interface);<\/li>\n
    • Implantar o Microsoft Defender nos servidores SharePoint;<\/li>\n
    • Revisar logs e sistemas em busca de comprometimentos;<\/li>\n
    • Isolar e analisar qualquer atividade suspeita nos servidores afetados;<\/li>\n
    • Presumir que o ambiente j\u00e1 pode ter sido violado \u2014 e tratar como incidente de seguran\u00e7a.<\/li>\n<\/ul>\n

       <\/p>\n

      Al\u00e9m disso, manter-se atento a novas atualiza\u00e7\u00f5es da Microsoft ser\u00e1 fundamental nos pr\u00f3ximos dias. O tempo \u00e9 um fator cr\u00edtico.<\/p>\n

       <\/p>\n

      O que tudo isso nos ensina?<\/strong><\/p>\n

        \n
      • Infraestruturas locais s\u00e3o cada vez mais alvos preferenciais;<\/li>\n
      • A seguran\u00e7a preventiva vale mais do que qualquer corre\u00e7\u00e3o emergencial;<\/li>\n
      • N\u00e3o ter patch dispon\u00edvel n\u00e3o \u00e9 desculpa para in\u00e9rcia. Mitiga\u00e7\u00e3o r\u00e1pida salva neg\u00f3cios.<\/li>\n<\/ul>\n

         <\/p>\n

        Esse novo ataque ao SharePoint n\u00e3o \u00e9 apenas mais um alerta: \u00e9 um chamado \u00e0 a\u00e7\u00e3o urgente para qualquer empresa que ainda acredita que sua estrutura est\u00e1 imune.<\/p>\n

        \u00a0Seguran\u00e7a da informa\u00e7\u00e3o deixou de ser uma op\u00e7\u00e3o. \u00c9 agora uma responsabilidade estrat\u00e9gica.<\/p>\n

         <\/p>\n

        Fonte: G1, Microsoft, CISA, Palo Alto Networks, Google Security, MSN.<\/em><\/p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]\n","protected":false},"excerpt":{"rendered":"

        Se sua empresa utiliza o SharePoint Server, este alerta \u00e9 para ontem. A Microsoft confirmou uma nova falha cr\u00edtica \u2014 identificada como CVE-2025-53770, que j\u00e1 est\u00e1 sendo ativamente explorada por cibercriminosos e atingiu \u00f3rg\u00e3os governamentais, universidades, empresas de energia e at\u00e9 uma operadora asi\u00e1tica de telecomunica\u00e7\u00f5es.   Com pontua\u00e7\u00e3o CVSS de 9.8, essa vulnerabilidade \u00e9 […]<\/p>\n","protected":false},"author":1,"featured_media":15886,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[8,1],"tags":[235,385,40,386],"class_list":["post-15880","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciberseguranca","category-sem-categoria","tag-microsoft","tag-sharepoint","tag-vulnerabilidade","tag-zeroday"],"yoast_head":"\nAtaque zero-day atinge SharePoint da Microsoft e exp\u00f5e falha grave - BS4IT<\/title>\n<meta name=\"description\" content=\"Ataque zero-day atinge SharePoint da Microsoft e exp\u00f5e falha grave. 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